./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF --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 ad40c7e9e7b0c80b1cec1e361a82d834fdd8270143479aa0f4bf8bc2b59c2aa5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:27:36,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:27:36,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:27:36,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:27:36,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:27:36,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:27:36,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:27:36,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:27:36,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:27:36,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:27:36,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:27:36,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:27:36,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:27:36,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:27:36,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:27:36,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:27:36,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:27:36,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:27:36,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:27:36,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:27:36,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:27:36,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:27:36,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:27:36,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:27:36,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:27:36,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:27:36,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:27:36,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:27:36,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:27:36,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:27:36,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:27:36,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:27:36,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:27:36,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:27:36,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:27:36,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:27:36,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:27:36,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:27:36,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:27:36,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:27:36,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:27:36,792 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:27:36,852 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:27:36,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:27:36,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:27:36,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:27:36,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:27:36,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:27:36,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:27:36,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:27:36,856 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:27:36,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:27:36,858 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:27:36,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:27:36,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:27:36,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:27:36,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:27:36,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:27:36,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:27:36,860 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:27:36,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:27:36,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:27:36,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:27:36,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:27:36,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:27:36,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:27:36,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:27:36,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:27:36,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:27:36,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:27:36,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:27:36,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:27:36,865 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:27:36,866 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:27:36,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:27:36,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:27:36,867 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_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad40c7e9e7b0c80b1cec1e361a82d834fdd8270143479aa0f4bf8bc2b59c2aa5 [2021-11-20 06:27:37,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:27:37,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:27:37,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:27:37,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:27:37,267 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:27:37,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c [2021-11-20 06:27:37,348 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/data/bdffba817/153ae632e5a145a790c5322f2a1dcfe0/FLAG59016fddb [2021-11-20 06:27:37,885 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:27:37,886 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c [2021-11-20 06:27:37,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/data/bdffba817/153ae632e5a145a790c5322f2a1dcfe0/FLAG59016fddb [2021-11-20 06:27:38,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/data/bdffba817/153ae632e5a145a790c5322f2a1dcfe0 [2021-11-20 06:27:38,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:27:38,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:27:38,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:27:38,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:27:38,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:27:38,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c22e2da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38, skipping insertion in model container [2021-11-20 06:27:38,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:27:38,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:27:38,494 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_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c[588,601] [2021-11-20 06:27:38,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:27:38,525 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:27:38,539 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_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound5.c[588,601] [2021-11-20 06:27:38,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:27:38,565 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:27:38,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38 WrapperNode [2021-11-20 06:27:38,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:27:38,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:27:38,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:27:38,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:27:38,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,603 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-11-20 06:27:38,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:27:38,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:27:38,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:27:38,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:27:38,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:27:38,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:27:38,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:27:38,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:27:38,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (1/1) ... [2021-11-20 06:27:38,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:27:38,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:38,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:27:38,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:27:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:27:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:27:38,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:27:38,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:27:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:27:38,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:27:38,811 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:27:38,812 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:27:38,938 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:27:38,963 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:27:38,963 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:27:38,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:38 BoogieIcfgContainer [2021-11-20 06:27:38,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:27:38,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:27:38,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:27:38,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:27:38,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:27:38" (1/3) ... [2021-11-20 06:27:38,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5929c720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:27:38, skipping insertion in model container [2021-11-20 06:27:38,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:38" (2/3) ... [2021-11-20 06:27:38,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5929c720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:27:38, skipping insertion in model container [2021-11-20 06:27:38,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:38" (3/3) ... [2021-11-20 06:27:38,974 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound5.c [2021-11-20 06:27:38,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:27:38,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:27:39,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:27:39,039 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 [2021-11-20 06:27:39,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:27:39,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:27:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:27:39,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:39,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:39,068 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -588951690, now seen corresponding path program 1 times [2021-11-20 06:27:39,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670646109] [2021-11-20 06:27:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:39,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:39,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:39,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670646109] [2021-11-20 06:27:39,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670646109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:39,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:39,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:27:39,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544241699] [2021-11-20 06:27:39,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:39,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:27:39,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:27:39,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:27:39,295 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-20 06:27:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:39,326 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-11-20 06:27:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:27:39,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2021-11-20 06:27:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:39,338 INFO L225 Difference]: With dead ends: 51 [2021-11-20 06:27:39,339 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 06:27:39,343 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 [2021-11-20 06:27:39,347 INFO L933 BasicCegarLoop]: 37 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, 37 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 [2021-11-20 06:27:39,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:27:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 06:27:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 06:27:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 06:27:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2021-11-20 06:27:39,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2021-11-20 06:27:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:39,396 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2021-11-20 06:27:39,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-20 06:27:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2021-11-20 06:27:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:27:39,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:39,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:39,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:27:39,400 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1187604804, now seen corresponding path program 1 times [2021-11-20 06:27:39,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:39,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510110611] [2021-11-20 06:27:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:39,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:39,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:39,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510110611] [2021-11-20 06:27:39,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510110611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:39,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:39,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:27:39,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111519126] [2021-11-20 06:27:39,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:39,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:39,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:39,684 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-20 06:27:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:39,793 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-20 06:27:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:27:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2021-11-20 06:27:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:39,795 INFO L225 Difference]: With dead ends: 29 [2021-11-20 06:27:39,795 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 06:27:39,796 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 [2021-11-20 06:27:39,798 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:39,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 85 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 06:27:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-20 06:27:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 06:27:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-11-20 06:27:39,816 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2021-11-20 06:27:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:39,817 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-11-20 06:27:39,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-20 06:27:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-11-20 06:27:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:27:39,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:39,819 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:39,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:27:39,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1137950087, now seen corresponding path program 1 times [2021-11-20 06:27:39,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:39,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944779191] [2021-11-20 06:27:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:39,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:39,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:39,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023311664] [2021-11-20 06:27:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:39,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:39,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:39,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:39,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:27:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:39,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:27:39,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:40,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:40,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:40,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944779191] [2021-11-20 06:27:40,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023311664] [2021-11-20 06:27:40,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023311664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:40,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:40,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:27:40,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623296186] [2021-11-20 06:27:40,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:40,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:40,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:40,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:40,149 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-20 06:27:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:40,292 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2021-11-20 06:27:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-11-20 06:27:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:40,296 INFO L225 Difference]: With dead ends: 46 [2021-11-20 06:27:40,298 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 06:27:40,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:40,300 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:40,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 06:27:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-11-20 06:27:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 06:27:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-11-20 06:27:40,336 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 14 [2021-11-20 06:27:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:40,337 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-11-20 06:27:40,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-20 06:27:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-11-20 06:27:40,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:27:40,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:40,339 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:40,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:40,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:40,560 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:40,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1500531996, now seen corresponding path program 1 times [2021-11-20 06:27:40,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:40,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861584995] [2021-11-20 06:27:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:40,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:40,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:40,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573903302] [2021-11-20 06:27:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:40,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:40,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:40,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:40,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:27:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:27:40,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:27:40,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:40,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861584995] [2021-11-20 06:27:40,797 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:40,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573903302] [2021-11-20 06:27:40,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573903302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:40,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:40,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:27:40,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841056215] [2021-11-20 06:27:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:40,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:40,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:40,809 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-20 06:27:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:40,902 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-11-20 06:27:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 19 [2021-11-20 06:27:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:40,906 INFO L225 Difference]: With dead ends: 50 [2021-11-20 06:27:40,907 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 06:27:40,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:40,910 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:40,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 133 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 06:27:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-20 06:27:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 06:27:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2021-11-20 06:27:40,947 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 19 [2021-11-20 06:27:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:40,948 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2021-11-20 06:27:40,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-20 06:27:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2021-11-20 06:27:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:27:40,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:40,951 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:40,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:41,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:41,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:41,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1926539111, now seen corresponding path program 1 times [2021-11-20 06:27:41,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:41,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409971751] [2021-11-20 06:27:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:41,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:41,202 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:41,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553362450] [2021-11-20 06:27:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:41,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:41,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:41,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:41,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:27:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:27:41,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:27:41,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:41,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:41,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409971751] [2021-11-20 06:27:41,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:41,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553362450] [2021-11-20 06:27:41,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553362450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:41,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:41,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:27:41,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597564111] [2021-11-20 06:27:41,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:41,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:41,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:41,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:41,456 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 06:27:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:41,562 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-11-20 06:27:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-11-20 06:27:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:41,564 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:27:41,564 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 06:27:41,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:41,566 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:41,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 125 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 06:27:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-20 06:27:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:27:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-11-20 06:27:41,586 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 24 [2021-11-20 06:27:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:41,587 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-11-20 06:27:41,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 06:27:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-11-20 06:27:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:27:41,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:41,590 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:41,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:41,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:41,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:41,813 INFO L85 PathProgramCache]: Analyzing trace with hash -492592860, now seen corresponding path program 1 times [2021-11-20 06:27:41,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:41,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235717244] [2021-11-20 06:27:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:41,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:41,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:41,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79170865] [2021-11-20 06:27:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:41,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:41,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:41,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:41,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:27:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:27:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:27:42,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:27:42,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:42,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235717244] [2021-11-20 06:27:42,493 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:42,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79170865] [2021-11-20 06:27:42,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79170865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:42,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:42,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 06:27:42,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458086739] [2021-11-20 06:27:42,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:42,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:42,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:42,496 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:27:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:42,941 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-11-20 06:27:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:27:42,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41 [2021-11-20 06:27:42,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:42,944 INFO L225 Difference]: With dead ends: 69 [2021-11-20 06:27:42,944 INFO L226 Difference]: Without dead ends: 67 [2021-11-20 06:27:42,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:42,946 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:42,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 160 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:27:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-20 06:27:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2021-11-20 06:27:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:27:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-20 06:27:42,962 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 41 [2021-11-20 06:27:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:42,962 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-20 06:27:42,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:27:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-20 06:27:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 06:27:42,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:42,968 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:42,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:43,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:43,184 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1495173479, now seen corresponding path program 2 times [2021-11-20 06:27:43,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:43,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351868304] [2021-11-20 06:27:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:43,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:43,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:43,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433716920] [2021-11-20 06:27:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:27:43,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:43,221 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:43,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:27:43,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:27:43,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:27:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:27:43,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:27:43,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351868304] [2021-11-20 06:27:43,774 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433716920] [2021-11-20 06:27:43,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433716920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:43,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:43,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 06:27:43,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780048648] [2021-11-20 06:27:43,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:43,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:43,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:43,777 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 06:27:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:43,943 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-11-20 06:27:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:27:43,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46 [2021-11-20 06:27:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:43,950 INFO L225 Difference]: With dead ends: 73 [2021-11-20 06:27:43,950 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 06:27:43,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:27:43,952 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:43,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 268 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 06:27:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2021-11-20 06:27:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 06:27:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-11-20 06:27:43,982 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 46 [2021-11-20 06:27:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:43,982 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-11-20 06:27:43,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 06:27:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-11-20 06:27:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:27:43,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:43,987 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:44,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:44,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:27:44,203 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash 900098756, now seen corresponding path program 3 times [2021-11-20 06:27:44,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:44,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231572987] [2021-11-20 06:27:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:44,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:44,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219736639] [2021-11-20 06:27:44,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:27:44,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:44,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:44,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:44,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:27:44,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:27:44,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:27:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-20 06:27:44,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-20 06:27:45,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:45,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231572987] [2021-11-20 06:27:45,403 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:45,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219736639] [2021-11-20 06:27:45,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219736639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:45,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:45,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 06:27:45,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110530618] [2021-11-20 06:27:45,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:45,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:45,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:45,406 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:27:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:45,805 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-11-20 06:27:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:27:45,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 51 [2021-11-20 06:27:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:45,808 INFO L225 Difference]: With dead ends: 85 [2021-11-20 06:27:45,808 INFO L226 Difference]: Without dead ends: 77 [2021-11-20 06:27:45,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:27:45,809 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:45,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 143 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:27:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-20 06:27:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-11-20 06:27:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 45 states have internal predecessors, (45), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 06:27:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-11-20 06:27:45,826 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 51 [2021-11-20 06:27:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:45,826 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-11-20 06:27:45,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:27:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-11-20 06:27:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 06:27:45,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:45,829 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:45,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:46,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:27:46,044 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1061977627, now seen corresponding path program 1 times [2021-11-20 06:27:46,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:46,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804001477] [2021-11-20 06:27:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:46,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:46,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:46,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808983482] [2021-11-20 06:27:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:46,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:46,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:46,058 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:46,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:27:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:27:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-20 06:27:46,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:46,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:46,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804001477] [2021-11-20 06:27:46,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:46,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808983482] [2021-11-20 06:27:46,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808983482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:46,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:46,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 06:27:46,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050900120] [2021-11-20 06:27:46,963 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:46,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:27:46,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:27:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:27:46,964 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:27:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:47,129 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-11-20 06:27:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:27:47,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2021-11-20 06:27:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:47,135 INFO L225 Difference]: With dead ends: 87 [2021-11-20 06:27:47,135 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 06:27:47,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:27:47,140 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:47,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 06:27:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-11-20 06:27:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 06:27:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-11-20 06:27:47,166 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 67 [2021-11-20 06:27:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:47,167 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-11-20 06:27:47,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 06:27:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-11-20 06:27:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 06:27:47,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:47,169 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:47,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:47,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:47,369 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1246911088, now seen corresponding path program 1 times [2021-11-20 06:27:47,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:47,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684641636] [2021-11-20 06:27:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:47,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:47,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377982265] [2021-11-20 06:27:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:47,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:47,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:47,385 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:47,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:27:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:47,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:27:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-20 06:27:48,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-20 06:27:49,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684641636] [2021-11-20 06:27:49,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:49,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377982265] [2021-11-20 06:27:49,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377982265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:49,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:49,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-11-20 06:27:49,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278379392] [2021-11-20 06:27:49,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:49,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:27:49,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:27:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:49,100 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:27:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:50,319 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2021-11-20 06:27:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:27:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 72 [2021-11-20 06:27:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:50,321 INFO L225 Difference]: With dead ends: 101 [2021-11-20 06:27:50,321 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 06:27:50,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:27:50,323 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 19 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:50,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 221 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:27:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 06:27:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 06:27:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-20 06:27:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-11-20 06:27:50,362 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 72 [2021-11-20 06:27:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:50,363 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-11-20 06:27:50,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:27:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-11-20 06:27:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 06:27:50,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:50,366 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:50,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:50,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:27:50,592 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:50,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1961933060, now seen corresponding path program 4 times [2021-11-20 06:27:50,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:50,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789013297] [2021-11-20 06:27:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:50,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:50,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:50,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67755678] [2021-11-20 06:27:50,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:27:50,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:50,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:50,602 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:50,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:27:50,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:27:50,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:27:50,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 56 proven. 16 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 06:27:51,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 56 proven. 16 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 06:27:51,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:51,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789013297] [2021-11-20 06:27:51,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:51,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67755678] [2021-11-20 06:27:51,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67755678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:51,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:51,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-20 06:27:51,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856980226] [2021-11-20 06:27:51,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:51,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:27:51,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:27:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:27:51,569 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:27:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:52,508 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-11-20 06:27:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:27:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) Word has length 73 [2021-11-20 06:27:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:52,512 INFO L225 Difference]: With dead ends: 108 [2021-11-20 06:27:52,512 INFO L226 Difference]: Without dead ends: 106 [2021-11-20 06:27:52,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:27:52,513 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:52,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 145 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:27:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-20 06:27:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-11-20 06:27:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 25 states have call successors, (25), 16 states have call predecessors, (25), 16 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-20 06:27:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-11-20 06:27:52,542 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 73 [2021-11-20 06:27:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:52,543 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-11-20 06:27:52,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-20 06:27:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-11-20 06:27:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:27:52,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:52,546 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:52,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:52,759 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 671163038, now seen corresponding path program 2 times [2021-11-20 06:27:52,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:52,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780592036] [2021-11-20 06:27:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:52,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:52,770 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:52,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197474970] [2021-11-20 06:27:52,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:27:52,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:52,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:52,771 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:52,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:27:52,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:27:52,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:52,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:27:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-11-20 06:27:53,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:53,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:53,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780592036] [2021-11-20 06:27:53,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:53,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197474970] [2021-11-20 06:27:53,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197474970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:53,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:53,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-20 06:27:53,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403457647] [2021-11-20 06:27:53,731 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:53,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:53,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:53,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:53,733 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:27:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:53,952 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-11-20 06:27:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:27:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 94 [2021-11-20 06:27:53,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:53,954 INFO L225 Difference]: With dead ends: 113 [2021-11-20 06:27:53,954 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 06:27:53,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:27:53,956 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:53,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 234 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 06:27:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-20 06:27:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 23 states have call successors, (23), 17 states have call predecessors, (23), 17 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:27:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2021-11-20 06:27:53,983 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 94 [2021-11-20 06:27:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:53,984 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2021-11-20 06:27:53,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:27:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2021-11-20 06:27:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:27:53,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:53,991 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:54,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:54,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:54,207 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1837317061, now seen corresponding path program 3 times [2021-11-20 06:27:54,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:54,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333956349] [2021-11-20 06:27:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:54,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:54,229 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:54,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413370072] [2021-11-20 06:27:54,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:27:54,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:54,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:54,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:54,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:27:54,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:27:54,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:27:54,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2021-11-20 06:27:55,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:55,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:55,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333956349] [2021-11-20 06:27:55,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:55,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413370072] [2021-11-20 06:27:55,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413370072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:55,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:55,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-20 06:27:55,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856238520] [2021-11-20 06:27:55,425 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:55,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:27:55,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:27:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:27:55,427 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 06:27:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:55,764 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2021-11-20 06:27:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:27:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 121 [2021-11-20 06:27:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:55,766 INFO L225 Difference]: With dead ends: 111 [2021-11-20 06:27:55,767 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 06:27:55,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:27:55,768 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:55,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 99 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 06:27:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-20 06:27:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 23 states have call successors, (23), 18 states have call predecessors, (23), 17 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:27:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-11-20 06:27:55,792 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 121 [2021-11-20 06:27:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:55,794 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-11-20 06:27:55,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 06:27:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-11-20 06:27:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 06:27:55,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:55,800 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:55,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:56,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:56,015 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1974193296, now seen corresponding path program 2 times [2021-11-20 06:27:56,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:56,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243694443] [2021-11-20 06:27:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:56,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:56,035 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:56,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772795995] [2021-11-20 06:27:56,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:27:56,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:56,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:56,040 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:56,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:27:56,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:27:56,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:27:56,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 44 proven. 42 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-11-20 06:27:56,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:57,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:57,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243694443] [2021-11-20 06:27:57,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:27:57,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772795995] [2021-11-20 06:27:57,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772795995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:57,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:57,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-20 06:27:57,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815567205] [2021-11-20 06:27:57,044 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:57,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:27:57,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:27:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:27:57,046 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-20 06:27:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:57,307 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2021-11-20 06:27:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:27:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 126 [2021-11-20 06:27:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:57,310 INFO L225 Difference]: With dead ends: 133 [2021-11-20 06:27:57,310 INFO L226 Difference]: Without dead ends: 122 [2021-11-20 06:27:57,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:27:57,312 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:57,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 324 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:57,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-20 06:27:57,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-20 06:27:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 06:27:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2021-11-20 06:27:57,347 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 126 [2021-11-20 06:27:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:57,348 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2021-11-20 06:27:57,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-20 06:27:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2021-11-20 06:27:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 06:27:57,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:57,352 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:57,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:57,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:27:57,570 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash 593109261, now seen corresponding path program 3 times [2021-11-20 06:27:57,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:57,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463259990] [2021-11-20 06:27:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:57,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:57,581 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:27:57,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666741875] [2021-11-20 06:27:57,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:27:57,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:57,585 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:57,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:27:57,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:27:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:57,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 06:27:57,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 251 proven. 69 refuted. 0 times theorem prover too weak. 1208 trivial. 0 not checked. [2021-11-20 06:28:07,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 196 proven. 39 refuted. 0 times theorem prover too weak. 1293 trivial. 0 not checked. [2021-11-20 06:28:09,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463259990] [2021-11-20 06:28:09,242 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:28:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666741875] [2021-11-20 06:28:09,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666741875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:09,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:09,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-11-20 06:28:09,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397213472] [2021-11-20 06:28:09,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:09,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:28:09,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:09,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:28:09,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:28:09,245 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2021-11-20 06:28:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:10,096 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-11-20 06:28:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:28:10,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) Word has length 153 [2021-11-20 06:28:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:10,098 INFO L225 Difference]: With dead ends: 122 [2021-11-20 06:28:10,098 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 06:28:10,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:28:10,100 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:10,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 91 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:28:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 06:28:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 06:28:10,101 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) [2021-11-20 06:28:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 06:28:10,101 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 153 [2021-11-20 06:28:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:10,101 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 06:28:10,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 8 states have call predecessors, (31), 9 states have call successors, (31) [2021-11-20 06:28:10,101 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 06:28:10,102 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 06:28:10,104 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:28:10,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-20 06:28:10,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:28:10,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 06:28:24,066 WARN L227 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 151 DAG size of output: 70 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 06:28:27,412 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 06:28:27,412 INFO L854 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* 6 |ULTIMATE.start_main_~z~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|)) (+ 12 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2021-11-20 06:28:27,412 INFO L854 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse7 (* 2 |ULTIMATE.start_main_~z~0#1|)) (.cse2 (* 12 |ULTIMATE.start_main_~y~0#1|)) (.cse0 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (let ((.cse5 (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 .cse1 1))) (.cse3 (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|)))) (.cse6 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) .cse7) (+ 6 (* 18 |ULTIMATE.start_main_~x~0#1|) .cse2))) (.cse4 (<= 0 |ULTIMATE.start_main_~a~0#1|))) (or (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (+ .cse0 5 |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (+ .cse1 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* 6 |ULTIMATE.start_main_~z~0#1|) .cse2) (+ 12 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) .cse3 (< |ULTIMATE.start_main_~a~0#1| (div (+ (* |ULTIMATE.start_main_~z~0#1| (- 1)) 6) (- 6))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) .cse4) (and .cse5 .cse3 .cse6 (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~a~0#1|) 10) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) .cse7)) (= |ULTIMATE.start_main_~z~0#1| 18)) (and .cse5 (= |ULTIMATE.start_main_~x~0#1| 1) .cse3 (< |ULTIMATE.start_main_~a~0#1| 1) .cse6 .cse4) (and (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~n~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= 6 |ULTIMATE.start_main_~z~0#1|))))) [2021-11-20 06:28:27,412 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* 2 |ULTIMATE.start_main_~z~0#1|)) (+ 6 (* 18 |ULTIMATE.start_main_~x~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|)))) [2021-11-20 06:28:27,412 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* 2 |ULTIMATE.start_main_~z~0#1|)) (+ 6 (* 18 |ULTIMATE.start_main_~x~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|)))) [2021-11-20 06:28:27,413 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse7 (* 2 |ULTIMATE.start_main_~z~0#1|)) (.cse2 (* 12 |ULTIMATE.start_main_~y~0#1|)) (.cse0 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)))) (let ((.cse5 (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 .cse1 1))) (.cse3 (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|)))) (.cse6 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) .cse7) (+ 6 (* 18 |ULTIMATE.start_main_~x~0#1|) .cse2))) (.cse4 (<= 0 |ULTIMATE.start_main_~a~0#1|))) (or (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (+ .cse0 5 |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (+ .cse1 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* 6 |ULTIMATE.start_main_~z~0#1|) .cse2) (+ 12 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) .cse3 (< |ULTIMATE.start_main_~a~0#1| (div (+ (* |ULTIMATE.start_main_~z~0#1| (- 1)) 6) (- 6))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) .cse4) (and .cse5 .cse3 .cse6 (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~a~0#1|) 10) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) .cse7)) (= |ULTIMATE.start_main_~z~0#1| 18)) (and .cse5 (= |ULTIMATE.start_main_~x~0#1| 1) .cse3 (< |ULTIMATE.start_main_~a~0#1| 1) .cse6 .cse4) (and (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~n~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= 6 |ULTIMATE.start_main_~z~0#1|))))) [2021-11-20 06:28:27,413 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-11-20 06:28:27,413 INFO L858 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2021-11-20 06:28:27,413 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* 6 |ULTIMATE.start_main_~z~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|)) (+ 12 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2021-11-20 06:28:27,413 INFO L854 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* 6 |ULTIMATE.start_main_~z~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|)) (+ 12 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2021-11-20 06:28:27,413 INFO L854 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* 6 |ULTIMATE.start_main_~z~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|)) (+ 12 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2021-11-20 06:28:27,413 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-20 06:28:27,413 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 06:28:27,413 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-20 06:28:27,413 INFO L861 garLoopResultBuilder]: At program point L55(lines 22 56) the Hoare annotation is: true [2021-11-20 06:28:27,413 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-11-20 06:28:27,414 INFO L854 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* 2 |ULTIMATE.start_main_~z~0#1|)) (+ 6 (* 18 |ULTIMATE.start_main_~x~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|)))) [2021-11-20 06:28:27,414 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))))) (or (let ((.cse1 (* 2 |ULTIMATE.start_main_~z~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (or (and (< |ULTIMATE.start_main_~a~0#1| 65536) (<= (mod |ULTIMATE.start_main_~a~0#1| 65536) 32767) (<= 0 |ULTIMATE.start_main_~a~0#1|)) (and (<= 0 (+ 65536 |ULTIMATE.start_main_~a~0#1|)) (< (div (+ |ULTIMATE.start_main_~a~0#1| 32768) (- 65536)) (+ (div (+ (- 1) (* |ULTIMATE.start_main_~a~0#1| (- 1))) 65536) 1)) (< |ULTIMATE.start_main_~a~0#1| 0))) .cse0 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) .cse1) (+ 6 (* 18 |ULTIMATE.start_main_~x~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|))) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~a~0#1|) 10) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) .cse1)))) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0) (= 6 |ULTIMATE.start_main_~z~0#1|)))) [2021-11-20 06:28:27,414 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-11-20 06:28:27,414 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 12 |ULTIMATE.start_main_~y~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1| 5) (= (+ (* 6 |ULTIMATE.start_main_~z~0#1|) .cse0) (+ 12 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|))) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* 2 |ULTIMATE.start_main_~z~0#1|)) (+ 6 (* 18 |ULTIMATE.start_main_~x~0#1|) .cse0)) (<= 0 |ULTIMATE.start_main_~a~0#1|))) [2021-11-20 06:28:27,414 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (<= |ULTIMATE.start_main_~a~0#1| 5) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (* 2 |ULTIMATE.start_main_~z~0#1|)) (+ 6 (* 18 |ULTIMATE.start_main_~x~0#1|) (* 12 |ULTIMATE.start_main_~y~0#1|))) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2021-11-20 06:28:27,414 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-11-20 06:28:27,415 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-11-20 06:28:27,415 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-11-20 06:28:27,415 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-11-20 06:28:27,415 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-11-20 06:28:27,415 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-20 06:28:27,419 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2021-11-20 06:28:27,420 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:28:27,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:28:27 BoogieIcfgContainer [2021-11-20 06:28:27,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:28:27,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:28:27,435 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:28:27,435 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:28:27,435 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:38" (3/4) ... [2021-11-20 06:28:27,438 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 06:28:27,444 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-20 06:28:27,448 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-20 06:28:27,448 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-20 06:28:27,449 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 06:28:27,449 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 06:28:27,482 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:28:27,482 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:28:27,483 INFO L158 Benchmark]: Toolchain (without parser) took 49239.16ms. Allocated memory was 98.6MB in the beginning and 197.1MB in the end (delta: 98.6MB). Free memory was 60.8MB in the beginning and 119.6MB in the end (delta: -58.8MB). Peak memory consumption was 40.6MB. Max. memory is 16.1GB. [2021-11-20 06:28:27,483 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:28:27,484 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.69ms. Allocated memory is still 98.6MB. Free memory was 60.6MB in the beginning and 74.0MB in the end (delta: -13.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:28:27,484 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.59ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 72.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:28:27,484 INFO L158 Benchmark]: Boogie Preprocessor took 24.89ms. Allocated memory is still 98.6MB. Free memory was 72.4MB in the beginning and 71.5MB in the end (delta: 978.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:28:27,485 INFO L158 Benchmark]: RCFGBuilder took 335.67ms. Allocated memory is still 98.6MB. Free memory was 71.2MB in the beginning and 61.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:28:27,485 INFO L158 Benchmark]: TraceAbstraction took 48467.63ms. Allocated memory was 98.6MB in the beginning and 197.1MB in the end (delta: 98.6MB). Free memory was 61.0MB in the beginning and 122.7MB in the end (delta: -61.8MB). Peak memory consumption was 108.4MB. Max. memory is 16.1GB. [2021-11-20 06:28:27,486 INFO L158 Benchmark]: Witness Printer took 47.97ms. Allocated memory is still 197.1MB. Free memory was 122.7MB in the beginning and 119.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 06:28:27,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 315.69ms. Allocated memory is still 98.6MB. Free memory was 60.6MB in the beginning and 74.0MB in the end (delta: -13.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.59ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 72.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.89ms. Allocated memory is still 98.6MB. Free memory was 72.4MB in the beginning and 71.5MB in the end (delta: 978.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 335.67ms. Allocated memory is still 98.6MB. Free memory was 71.2MB in the beginning and 61.5MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 48467.63ms. Allocated memory was 98.6MB in the beginning and 197.1MB in the end (delta: 98.6MB). Free memory was 61.0MB in the beginning and 122.7MB in the end (delta: -61.8MB). Peak memory consumption was 108.4MB. Max. memory is 16.1GB. * Witness Printer took 47.97ms. Allocated memory is still 197.1MB. Free memory was 122.7MB in the beginning and 119.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.4s, OverallIterations: 15, TraceHistogramMax: 28, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 17.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 209 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 150 mSDsluCounter, 2369 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1831 mSDsCounter, 353 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1457 IncrementalHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 353 mSolverCounterUnsat, 538 mSDtfsCounter, 1457 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1488 GetRequests, 1335 SyntacticMatches, 10 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=14, InterpolantAutomatonStates: 111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 46 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 73 PreInvPairs, 128 NumberOfFragments, 849 HoareAnnotationTreeSize, 73 FomulaSimplifications, 6385 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 14 FomulaSimplificationsInter, 15484 FormulaSimplificationTreeSizeReductionInter, 16.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 20.5s InterpolantComputationTime, 919 NumberOfCodeBlocks, 704 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1334 ConstructedInterpolants, 0 QuantifiedInterpolants, 6058 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1742 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 7352/7616 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: 33]: Loop Invariant Derived loop invariant: (((((cond == 1 && n * n * n == x) && a <= 5) && 6 * z + 12 * y == 12 + z * z) && z == 6 + 6 * n) && n <= a + 1) && 0 <= a - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-20 06:28:27,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35f5a4d-7c1c-4b11-8469-06b5da47d1b5/bin/uautomizer-DQz5hQGWxF/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