./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i --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_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/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_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/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_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/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 ea97fe631de3abcfa1030cdb800e2845e2e97a42347e391a7c9fd401d3d0b815 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:10:25,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:10:25,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:10:25,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:10:25,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:10:25,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:10:25,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:10:25,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:10:25,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:10:25,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:10:25,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:10:25,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:10:25,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:10:25,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:10:25,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:10:25,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:10:25,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:10:25,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:10:25,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:10:25,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:10:26,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:10:26,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:10:26,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:10:26,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:10:26,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:10:26,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:10:26,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:10:26,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:10:26,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:10:26,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:10:26,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:10:26,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:10:26,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:10:26,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:10:26,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:10:26,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:10:26,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:10:26,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:10:26,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:10:26,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:10:26,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:10:26,019 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:10:26,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:10:26,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:10:26,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:10:26,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:10:26,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:10:26,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:10:26,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:10:26,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:10:26,048 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:10:26,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:10:26,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:10:26,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:10:26,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:10:26,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:10:26,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:10:26,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:10:26,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:10:26,050 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:10:26,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:10:26,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:10:26,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:10:26,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:10:26,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:10:26,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:10:26,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:10:26,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:10:26,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:10:26,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:10:26,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:10:26,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:10:26,053 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:10:26,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:10:26,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:10:26,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:10:26,053 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_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea97fe631de3abcfa1030cdb800e2845e2e97a42347e391a7c9fd401d3d0b815 [2021-11-20 07:10:26,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:10:26,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:10:26,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:10:26,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:10:26,349 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:10:26,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i [2021-11-20 07:10:26,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/data/b246450bb/80b4d5a7d2e44c418c67f376c259e58a/FLAG9dddcbbee [2021-11-20 07:10:26,905 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:10:26,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i [2021-11-20 07:10:26,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/data/b246450bb/80b4d5a7d2e44c418c67f376c259e58a/FLAG9dddcbbee [2021-11-20 07:10:27,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/data/b246450bb/80b4d5a7d2e44c418c67f376c259e58a [2021-11-20 07:10:27,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:10:27,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:10:27,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:10:27,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:10:27,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:10:27,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6819e1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27, skipping insertion in model container [2021-11-20 07:10:27,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:10:27,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:10:27,551 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_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i[950,963] [2021-11-20 07:10:27,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:10:27,587 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:10:27,606 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_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i[950,963] [2021-11-20 07:10:27,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:10:27,648 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:10:27,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27 WrapperNode [2021-11-20 07:10:27,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:10:27,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:10:27,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:10:27,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:10:27,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,704 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-11-20 07:10:27,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:10:27,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:10:27,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:10:27,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:10:27,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:10:27,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:10:27,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:10:27,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:10:27,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (1/1) ... [2021-11-20 07:10:27,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:10:27,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:27,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:10:27,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:10:27,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:10:27,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:10:27,830 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:10:27,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:10:27,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:10:27,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:10:27,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:10:27,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:10:27,896 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:10:27,898 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:10:28,079 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:10:28,085 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:10:28,085 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 07:10:28,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:10:28 BoogieIcfgContainer [2021-11-20 07:10:28,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:10:28,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:10:28,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:10:28,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:10:28,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:10:27" (1/3) ... [2021-11-20 07:10:28,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed7ef33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:10:28, skipping insertion in model container [2021-11-20 07:10:28,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:10:27" (2/3) ... [2021-11-20 07:10:28,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed7ef33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:10:28, skipping insertion in model container [2021-11-20 07:10:28,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:10:28" (3/3) ... [2021-11-20 07:10:28,096 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound1.i [2021-11-20 07:10:28,101 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:10:28,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:10:28,148 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:10:28,155 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 07:10:28,156 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:10:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:10:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:10:28,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:28,181 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:28,181 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash 913242413, now seen corresponding path program 1 times [2021-11-20 07:10:28,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:28,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252489758] [2021-11-20 07:10:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:28,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:28,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:10:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:28,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 07:10:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:10:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:28,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:10:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:10:28,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:28,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252489758] [2021-11-20 07:10:28,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252489758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:28,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:28,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:10:28,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630407619] [2021-11-20 07:10:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:28,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:10:28,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:28,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:10:28,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:10:28,409 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:28,430 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2021-11-20 07:10:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:10:28,432 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-11-20 07:10:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:28,440 INFO L225 Difference]: With dead ends: 55 [2021-11-20 07:10:28,440 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 07:10:28,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 07:10:28,447 INFO L933 BasicCegarLoop]: 35 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, 35 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 07:10:28,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:10:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 07:10:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 07:10:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:10:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-20 07:10:28,486 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2021-11-20 07:10:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:28,487 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-20 07:10:28,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:10:28,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-20 07:10:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 07:10:28,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:28,490 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:28,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:10:28,490 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2061833476, now seen corresponding path program 1 times [2021-11-20 07:10:28,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678191413] [2021-11-20 07:10:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:28,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:28,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:28,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245648865] [2021-11-20 07:10:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:28,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:28,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:28,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:28,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:10:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:28,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:10:28,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:10:29,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:10:29,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:29,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678191413] [2021-11-20 07:10:29,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:29,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245648865] [2021-11-20 07:10:29,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245648865] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:29,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:10:29,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-11-20 07:10:29,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497908456] [2021-11-20 07:10:29,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:29,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:10:29,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:29,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:10:29,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:10:29,385 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:10:31,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:10:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:32,170 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-11-20 07:10:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:10:32,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-11-20 07:10:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:32,173 INFO L225 Difference]: With dead ends: 37 [2021-11-20 07:10:32,173 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 07:10:32,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:10:32,175 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:32,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 07:10:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 07:10:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-20 07:10:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:10:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-20 07:10:32,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2021-11-20 07:10:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:32,186 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-20 07:10:32,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:10:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-20 07:10:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:10:32,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:32,188 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:32,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:32,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:32,418 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1044269705, now seen corresponding path program 1 times [2021-11-20 07:10:32,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:32,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412748030] [2021-11-20 07:10:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:32,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:32,439 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:32,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406579788] [2021-11-20 07:10:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:32,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:32,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:32,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:10:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:10:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:10:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:10:33,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412748030] [2021-11-20 07:10:33,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406579788] [2021-11-20 07:10:33,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406579788] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:33,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:10:33,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-11-20 07:10:33,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883064538] [2021-11-20 07:10:33,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:33,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:10:33,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:33,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:10:33,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:10:33,386 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:10:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:33,431 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-11-20 07:10:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:10:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-11-20 07:10:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:33,435 INFO L225 Difference]: With dead ends: 42 [2021-11-20 07:10:33,435 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 07:10:33,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:10:33,437 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:33,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-11-20 07:10:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 07:10:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-20 07:10:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:10:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-11-20 07:10:33,456 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 33 [2021-11-20 07:10:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:33,456 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-11-20 07:10:33,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:10:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-11-20 07:10:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:10:33,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:33,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:33,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:33,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 07:10:33,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1786164585, now seen corresponding path program 1 times [2021-11-20 07:10:33,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:33,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133039673] [2021-11-20 07:10:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:33,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:33,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:33,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948294470] [2021-11-20 07:10:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:33,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:33,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:33,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:33,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:10:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:10:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:10:33,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:10:33,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133039673] [2021-11-20 07:10:33,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:33,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948294470] [2021-11-20 07:10:33,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948294470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:10:33,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:10:33,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:10:33,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484366808] [2021-11-20 07:10:33,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:10:33,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:10:33,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:33,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:10:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:10:33,868 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:10:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:33,899 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-11-20 07:10:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:10:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-20 07:10:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:33,902 INFO L225 Difference]: With dead ends: 51 [2021-11-20 07:10:33,902 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 07:10:33,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:10:33,903 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:33,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:10:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 07:10:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-20 07:10:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:10:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-20 07:10:33,911 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 39 [2021-11-20 07:10:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:33,912 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-20 07:10:33,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:10:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-20 07:10:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:10:33,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:33,914 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:33,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:34,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:34,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1444020969, now seen corresponding path program 1 times [2021-11-20 07:10:34,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:34,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577603420] [2021-11-20 07:10:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:34,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:34,163 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111696529] [2021-11-20 07:10:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:34,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:34,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:34,165 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:34,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:10:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:10:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:10:34,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:10:34,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:34,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577603420] [2021-11-20 07:10:34,527 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:34,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111696529] [2021-11-20 07:10:34,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111696529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:34,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:34,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-11-20 07:10:34,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643110421] [2021-11-20 07:10:34,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:34,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:10:34,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:10:34,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:10:34,530 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:10:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:34,696 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-20 07:10:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:10:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 39 [2021-11-20 07:10:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:34,698 INFO L225 Difference]: With dead ends: 39 [2021-11-20 07:10:34,698 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 07:10:34,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:10:34,700 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:34,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:10:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 07:10:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 07:10:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:10:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-20 07:10:34,706 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2021-11-20 07:10:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:34,707 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-20 07:10:34,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:10:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-20 07:10:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:10:34,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:34,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:34,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:34,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:34,920 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:34,921 INFO L85 PathProgramCache]: Analyzing trace with hash 145189394, now seen corresponding path program 1 times [2021-11-20 07:10:34,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:34,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381412712] [2021-11-20 07:10:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:34,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:34,933 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:34,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870496740] [2021-11-20 07:10:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:34,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:34,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:34,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:34,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c5b4eca-5a3b-4727-abd3-bb53d39ad32b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process