./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2a54f54b02d2bb65a6f46eeae11edba1907f4f082d2aaa313102e422e7e6122 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:05:53,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:05:53,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:05:53,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:05:53,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:05:53,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:05:53,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:05:53,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:05:53,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:05:53,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:05:53,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:05:53,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:05:53,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:05:53,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:05:53,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:05:53,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:05:53,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:05:53,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:05:53,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:05:53,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:05:53,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:05:53,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:05:53,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:05:53,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:05:53,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:05:53,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:05:53,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:05:53,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:05:53,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:05:53,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:05:53,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:05:53,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:05:53,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:05:53,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:05:53,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:05:53,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:05:53,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:05:53,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:05:53,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:05:53,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:05:53,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:05:53,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:05:53,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:05:53,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:05:53,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:05:53,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:05:53,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:05:53,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:05:53,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:05:53,925 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:05:53,925 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:05:53,925 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:05:53,925 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:05:53,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:05:53,926 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:05:53,926 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:05:53,926 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:05:53,926 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:05:53,927 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:05:53,927 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:05:53,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:05:53,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:05:53,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:05:53,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:05:53,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:05:53,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:05:53,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:05:53,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:05:53,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:05:53,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:05:53,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:05:53,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:05:53,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:05:53,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:05:53,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:05:53,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:05:53,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:05:53,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:05:53,932 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:05:53,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:05:53,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:05:53,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:05:53,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:05:53,933 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2a54f54b02d2bb65a6f46eeae11edba1907f4f082d2aaa313102e422e7e6122 [2021-11-23 02:05:54,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:05:54,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:05:54,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:05:54,221 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:05:54,226 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:05:54,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-11-23 02:05:54,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/data/d407d6dae/37ac39921f3d4694a024b0474861b591/FLAG2e8b7c8a8 [2021-11-23 02:05:54,774 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:05:54,774 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-11-23 02:05:54,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/data/d407d6dae/37ac39921f3d4694a024b0474861b591/FLAG2e8b7c8a8 [2021-11-23 02:05:55,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/data/d407d6dae/37ac39921f3d4694a024b0474861b591 [2021-11-23 02:05:55,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:05:55,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:05:55,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:05:55,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:05:55,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:05:55,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e37708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55, skipping insertion in model container [2021-11-23 02:05:55,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:05:55,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:05:55,357 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_addc8578-5904-4f11-9680-32c1c243cb62/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c[458,471] [2021-11-23 02:05:55,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:05:55,378 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:05:55,390 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_addc8578-5904-4f11-9680-32c1c243cb62/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound5.c[458,471] [2021-11-23 02:05:55,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:05:55,412 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:05:55,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55 WrapperNode [2021-11-23 02:05:55,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:05:55,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:05:55,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:05:55,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:05:55,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,451 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-11-23 02:05:55,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:05:55,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:05:55,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:05:55,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:05:55,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:05:55,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:05:55,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:05:55,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:05:55,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (1/1) ... [2021-11-23 02:05:55,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:05:55,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:55,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:05:55,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:05:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:05:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:05:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:05:55,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:05:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:05:55,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:05:55,662 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:05:55,663 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:05:55,781 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:05:55,804 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:05:55,805 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:05:55,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:55 BoogieIcfgContainer [2021-11-23 02:05:55,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:05:55,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:05:55,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:05:55,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:05:55,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:05:55" (1/3) ... [2021-11-23 02:05:55,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a20966d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:55, skipping insertion in model container [2021-11-23 02:05:55,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:55" (2/3) ... [2021-11-23 02:05:55,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a20966d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:55, skipping insertion in model container [2021-11-23 02:05:55,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:55" (3/3) ... [2021-11-23 02:05:55,826 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound5.c [2021-11-23 02:05:55,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:05:55,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:05:55,879 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:05:55,887 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=FINITE_AUTOMATA, 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 [2021-11-23 02:05:55,888 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:05:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:05:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:05:55,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:55,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:05:55,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1757604175, now seen corresponding path program 1 times [2021-11-23 02:05:55,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:55,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694689123] [2021-11-23 02:05:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:55,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:56,016 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:05:56,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031229169] [2021-11-23 02:05:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:56,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:56,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:56,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:05:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:56,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:05:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:05:56,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:05:56,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:56,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694689123] [2021-11-23 02:05:56,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:05:56,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031229169] [2021-11-23 02:05:56,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031229169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:56,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:56,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:05:56,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956531902] [2021-11-23 02:05:56,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:56,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:05:56,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:05:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:56,335 INFO L87 Difference]: Start difference. First operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:56,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:56,486 INFO L93 Difference]: Finished difference Result 38 states and 56 transitions. [2021-11-23 02:05:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:05:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:05:56,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:56,500 INFO L225 Difference]: With dead ends: 38 [2021-11-23 02:05:56,501 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 02:05:56,508 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 [2021-11-23 02:05:56,516 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:56,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 41 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:05:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 02:05:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 02:05:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:05:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 02:05:56,576 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2021-11-23 02:05:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:56,576 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 02:05:56,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 02:05:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:05:56,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:56,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:56,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:56,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:56,778 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:56,780 INFO L85 PathProgramCache]: Analyzing trace with hash -19935186, now seen corresponding path program 1 times [2021-11-23 02:05:56,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:56,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681179942] [2021-11-23 02:05:56,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:56,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:56,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:05:56,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935214516] [2021-11-23 02:05:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:56,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:56,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:56,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:56,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:05:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:05:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:05:57,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:05:57,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:57,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681179942] [2021-11-23 02:05:57,312 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:05:57,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935214516] [2021-11-23 02:05:57,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935214516] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:57,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:05:57,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-23 02:05:57,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253621632] [2021-11-23 02:05:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:57,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:05:57,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:05:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:05:57,317 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-23 02:05:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:57,362 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-23 02:05:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:05:57,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-23 02:05:57,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:57,364 INFO L225 Difference]: With dead ends: 25 [2021-11-23 02:05:57,365 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 02:05:57,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:05:57,368 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:57,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:05:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 02:05:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 02:05:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:05:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-11-23 02:05:57,377 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2021-11-23 02:05:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:57,378 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-11-23 02:05:57,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-23 02:05:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-11-23 02:05:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:05:57,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:57,383 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:57,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:57,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 02:05:57,611 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1489129899, now seen corresponding path program 1 times [2021-11-23 02:05:57,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608059198] [2021-11-23 02:05:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:57,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:57,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:05:57,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580497219] [2021-11-23 02:05:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:57,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:57,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:57,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:57,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:05:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:57,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:05:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:05:57,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:58,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608059198] [2021-11-23 02:05:58,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:05:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580497219] [2021-11-23 02:05:58,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580497219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:58,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125715532] [2021-11-23 02:05:58,285 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:05:58,285 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:05:58,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:05:58,301 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:05:58,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:05:59,476 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2021-11-23 02:05:59,669 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:29,504 WARN L227 SmtUtils]: Spent 29.80s on a formula simplification. DAG size of input: 71 DAG size of output: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:06:33,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '368#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:33,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:33,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:33,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-23 02:06:33,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448761526] [2021-11-23 02:06:33,279 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:33,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:06:33,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:06:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2021-11-23 02:06:33,281 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:06:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:33,362 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-23 02:06:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:06:33,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-23 02:06:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:33,364 INFO L225 Difference]: With dead ends: 28 [2021-11-23 02:06:33,364 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 02:06:33,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=59, Invalid=282, Unknown=1, NotChecked=0, Total=342 [2021-11-23 02:06:33,366 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:33,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 63 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 02:06:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 02:06:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:06:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-23 02:06:33,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2021-11-23 02:06:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:33,375 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-23 02:06:33,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:06:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-23 02:06:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:06:33,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:33,377 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-11-23 02:06:33,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:33,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:33,591 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:33,591 INFO L85 PathProgramCache]: Analyzing trace with hash -563106994, now seen corresponding path program 2 times [2021-11-23 02:06:33,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:33,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347073364] [2021-11-23 02:06:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:33,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:33,602 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:06:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257017442] [2021-11-23 02:06:33,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:06:33,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:33,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:33,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:33,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:06:33,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:06:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:33,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:06:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:06:33,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:34,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:34,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347073364] [2021-11-23 02:06:34,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:06:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257017442] [2021-11-23 02:06:34,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257017442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994289059] [2021-11-23 02:06:34,121 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:34,121 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:34,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:34,122 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:34,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:34,786 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2021-11-23 02:06:34,927 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:37,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '599#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:37,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:37,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:37,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-23 02:06:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576202296] [2021-11-23 02:06:37,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:37,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:06:37,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:06:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2021-11-23 02:06:37,810 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:06:37,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:37,902 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-23 02:06:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:06:37,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-23 02:06:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:37,903 INFO L225 Difference]: With dead ends: 31 [2021-11-23 02:06:37,904 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 02:06:37,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=68, Invalid=351, Unknown=1, NotChecked=0, Total=420 [2021-11-23 02:06:37,906 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:37,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 02:06:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 02:06:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:06:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-23 02:06:37,914 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 26 [2021-11-23 02:06:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:37,914 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-23 02:06:37,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:06:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-23 02:06:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 02:06:37,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:37,916 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2021-11-23 02:06:37,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:38,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:38,139 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:38,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2031862859, now seen corresponding path program 3 times [2021-11-23 02:06:38,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:38,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012035357] [2021-11-23 02:06:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:38,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:38,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:06:38,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235122391] [2021-11-23 02:06:38,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:06:38,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:38,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:38,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:06:38,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:06:38,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 02:06:38,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:06:38,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:38,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012035357] [2021-11-23 02:06:38,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:06:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235122391] [2021-11-23 02:06:38,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235122391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241046073] [2021-11-23 02:06:38,671 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:38,671 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:38,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:38,672 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:38,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:39,296 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2021-11-23 02:06:39,428 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:51,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '840#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:51,641 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:51,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:51,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-23 02:06:51,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759238283] [2021-11-23 02:06:51,642 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:51,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:06:51,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:06:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=288, Unknown=1, NotChecked=0, Total=342 [2021-11-23 02:06:51,644 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:06:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:51,767 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-23 02:06:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:06:51,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2021-11-23 02:06:51,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:51,769 INFO L225 Difference]: With dead ends: 34 [2021-11-23 02:06:51,769 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 02:06:51,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=64, Invalid=355, Unknown=1, NotChecked=0, Total=420 [2021-11-23 02:06:51,771 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:51,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 02:06:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 02:06:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:06:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-23 02:06:51,780 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 33 [2021-11-23 02:06:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:51,780 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-23 02:06:51,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:06:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-23 02:06:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:06:51,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:51,783 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2021-11-23 02:06:51,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:51,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:51,987 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:51,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1968307026, now seen corresponding path program 4 times [2021-11-23 02:06:51,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:51,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736018651] [2021-11-23 02:06:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:51,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:51,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:06:51,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113184496] [2021-11-23 02:06:51,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:06:51,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:51,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:51,999 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:52,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:06:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:06:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:06:52,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:52,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736018651] [2021-11-23 02:06:52,510 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:06:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113184496] [2021-11-23 02:06:52,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113184496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:52,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858040367] [2021-11-23 02:06:52,518 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:52,519 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:52,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:52,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:52,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:53,402 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 77 for LOIs [2021-11-23 02:06:53,841 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:54,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1113#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_44| Int)) (and (or (and (= |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| 1) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_44|) (= |__VERIFIER_assert_#in~cond| (ite (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67|))) (* 4 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_44|)) 1 0)) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_67|))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:06:54,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:54,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:54,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-23 02:06:54,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520133211] [2021-11-23 02:06:54,556 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:54,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:06:54,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:06:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:06:54,558 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:06:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:54,670 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-23 02:06:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:06:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2021-11-23 02:06:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:54,671 INFO L225 Difference]: With dead ends: 37 [2021-11-23 02:06:54,671 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 02:06:54,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:06:54,673 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:54,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 02:06:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 02:06:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:06:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-23 02:06:54,683 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 40 [2021-11-23 02:06:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:54,683 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-23 02:06:54,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:06:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-23 02:06:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:06:54,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:54,685 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1] [2021-11-23 02:06:54,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:54,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:06:54,890 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1747459819, now seen corresponding path program 5 times [2021-11-23 02:06:54,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:54,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246010230] [2021-11-23 02:06:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:54,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:54,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:06:54,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629449765] [2021-11-23 02:06:54,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:06:54,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:54,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:54,901 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:54,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:06:55,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 02:06:55,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 02:06:55,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:06:55,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:55,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:55,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246010230] [2021-11-23 02:06:55,683 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:06:55,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629449765] [2021-11-23 02:06:55,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629449765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:55,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886992196] [2021-11-23 02:06:55,686 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:55,686 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:55,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:55,687 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:55,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:56,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 77 for LOIs [2021-11-23 02:06:56,945 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:04,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1418#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_66| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_53| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| Int)) (and (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_53|) (= |__VERIFIER_assert_#in~cond| (ite (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_66| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|)) 1 0)) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_66| 32767) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|) (or (and (= |#NULL.offset| 0) (not (= (ite (= (* 4 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_53|) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|))) 1 0) 0)) (= |#NULL.base| 0)) (and (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_66| 1) (= |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| 1) (= |#NULL.offset| 0) (not (= (ite (= (* 4 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_53|) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_84|))) 1 0) 0)) (= |#NULL.base| 0))) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_66| 32768)))) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:07:04,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:04,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:07:04,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-23 02:07:04,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532999851] [2021-11-23 02:07:04,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:04,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:07:04,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:07:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=360, Unknown=1, NotChecked=0, Total=420 [2021-11-23 02:07:04,005 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:07:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:04,191 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-23 02:07:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:07:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2021-11-23 02:07:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:04,192 INFO L225 Difference]: With dead ends: 40 [2021-11-23 02:07:04,193 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 02:07:04,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=70, Invalid=435, Unknown=1, NotChecked=0, Total=506 [2021-11-23 02:07:04,194 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:04,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 191 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 02:07:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 02:07:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:07:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-23 02:07:04,206 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 47 [2021-11-23 02:07:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:04,207 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-23 02:07:04,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:07:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-23 02:07:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:07:04,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:04,209 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1] [2021-11-23 02:07:04,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 02:07:04,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:07:04,414 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash -324766194, now seen corresponding path program 6 times [2021-11-23 02:07:04,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:04,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278137520] [2021-11-23 02:07:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:04,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:04,421 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:07:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050217729] [2021-11-23 02:07:04,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:07:04,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:04,424 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:04,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:07:04,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:07:04,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:07:04,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:07:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 02:07:05,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:07:05,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:05,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278137520] [2021-11-23 02:07:05,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:07:05,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050217729] [2021-11-23 02:07:05,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050217729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:05,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:05,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:07:05,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191877686] [2021-11-23 02:07:05,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:07:05,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:07:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:07:05,076 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:07:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:05,128 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-23 02:07:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:07:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2021-11-23 02:07:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:05,129 INFO L225 Difference]: With dead ends: 39 [2021-11-23 02:07:05,130 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 02:07:05,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:07:05,131 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:05,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:07:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 02:07:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 02:07:05,133 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) [2021-11-23 02:07:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 02:07:05,133 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-11-23 02:07:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:05,134 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 02:07:05,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:07:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 02:07:05,134 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 02:07:05,139 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:07:05,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:05,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 02:07:05,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 02:07:05,674 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 02:07:05,674 INFO L854 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~k~0#1| 5)) (.cse1 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)))) (or (and (= |ULTIMATE.start_main_~c~0#1| 1) .cse0 (= |ULTIMATE.start_main_~y~0#1| 1) (< 0 |ULTIMATE.start_main_~k~0#1|) .cse1) (and (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) .cse0 .cse1 (= 2 |ULTIMATE.start_main_~c~0#1|)) (and (= 3 |ULTIMATE.start_main_~y~0#1|) .cse0 (< 2 |ULTIMATE.start_main_~k~0#1|) (= 3 |ULTIMATE.start_main_~c~0#1|) .cse1) (and (<= |ULTIMATE.start_main_~c~0#1| 5) (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) .cse0 (<= 5 |ULTIMATE.start_main_~c~0#1|) .cse1) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) .cse0 .cse1) (and (= |ULTIMATE.start_main_~y~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) .cse0 (= |ULTIMATE.start_main_~c~0#1| 4) .cse1))) [2021-11-23 02:07:05,675 INFO L854 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)))) (or (and (<= |ULTIMATE.start_main_~k~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) (< 0 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (<= |ULTIMATE.start_main_~c~0#1| 5) (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 5) .cse0) (and (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0)) (and (<= |ULTIMATE.start_main_~k~0#1| 2) (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 2) .cse0) (and (= 3 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 3) (< 2 |ULTIMATE.start_main_~k~0#1|) .cse0 (<= |ULTIMATE.start_main_~c~0#1| 3)) (and (<= |ULTIMATE.start_main_~c~0#1| 4) (= |ULTIMATE.start_main_~y~0#1| 4) (<= |ULTIMATE.start_main_~k~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) .cse0))) [2021-11-23 02:07:05,675 INFO L861 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: true [2021-11-23 02:07:05,675 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 02:07:05,675 INFO L854 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~k~0#1| 5)) (.cse1 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)))) (or (and (= |ULTIMATE.start_main_~c~0#1| 1) .cse0 (= |ULTIMATE.start_main_~y~0#1| 1) (< 0 |ULTIMATE.start_main_~k~0#1|) .cse1) (and (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) .cse0 .cse1 (= 2 |ULTIMATE.start_main_~c~0#1|)) (and (= 3 |ULTIMATE.start_main_~y~0#1|) .cse0 (< 2 |ULTIMATE.start_main_~k~0#1|) (= 3 |ULTIMATE.start_main_~c~0#1|) .cse1) (and (<= |ULTIMATE.start_main_~c~0#1| 5) (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) .cse0 (<= 5 |ULTIMATE.start_main_~c~0#1|) .cse1) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) .cse0 .cse1) (and (= |ULTIMATE.start_main_~y~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) .cse0 (= |ULTIMATE.start_main_~c~0#1| 4) .cse1))) [2021-11-23 02:07:05,675 INFO L858 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-11-23 02:07:05,676 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)) [2021-11-23 02:07:05,676 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-11-23 02:07:05,676 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-11-23 02:07:05,676 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-11-23 02:07:05,676 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-11-23 02:07:05,676 INFO L858 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-11-23 02:07:05,677 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-11-23 02:07:05,680 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1] [2021-11-23 02:07:05,681 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:07:05,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:07:05 BoogieIcfgContainer [2021-11-23 02:07:05,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:07:05,699 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:07:05,699 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:07:05,699 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:07:05,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:55" (3/4) ... [2021-11-23 02:07:05,703 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 02:07:05,709 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-23 02:07:05,713 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-11-23 02:07:05,713 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-23 02:07:05,713 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-23 02:07:05,713 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 02:07:05,756 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:07:05,757 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:07:05,758 INFO L158 Benchmark]: Toolchain (without parser) took 70592.17ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 83.9MB in the beginning and 70.6MB in the end (delta: 13.4MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. [2021-11-23 02:07:05,758 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 123.7MB. Free memory is still 100.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:07:05,759 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.82ms. Allocated memory is still 123.7MB. Free memory was 83.8MB in the beginning and 97.5MB in the end (delta: -13.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:07:05,759 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.32ms. Allocated memory is still 123.7MB. Free memory was 97.5MB in the beginning and 95.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:07:05,760 INFO L158 Benchmark]: Boogie Preprocessor took 23.09ms. Allocated memory is still 123.7MB. Free memory was 95.9MB in the beginning and 95.4MB in the end (delta: 516.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:07:05,760 INFO L158 Benchmark]: RCFGBuilder took 330.85ms. Allocated memory is still 123.7MB. Free memory was 94.9MB in the beginning and 84.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:07:05,761 INFO L158 Benchmark]: TraceAbstraction took 69889.67ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 84.4MB in the beginning and 73.7MB in the end (delta: 10.7MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. [2021-11-23 02:07:05,761 INFO L158 Benchmark]: Witness Printer took 57.76ms. Allocated memory is still 148.9MB. Free memory was 73.7MB in the beginning and 70.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:07:05,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 123.7MB. Free memory is still 100.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 242.82ms. Allocated memory is still 123.7MB. Free memory was 83.8MB in the beginning and 97.5MB in the end (delta: -13.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.32ms. Allocated memory is still 123.7MB. Free memory was 97.5MB in the beginning and 95.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.09ms. Allocated memory is still 123.7MB. Free memory was 95.9MB in the beginning and 95.4MB in the end (delta: 516.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 330.85ms. Allocated memory is still 123.7MB. Free memory was 94.9MB in the beginning and 84.9MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 69889.67ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 84.4MB in the beginning and 73.7MB in the end (delta: 10.7MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. * Witness Printer took 57.76ms. Allocated memory is still 148.9MB. Free memory was 73.7MB in the beginning and 70.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: 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, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 69.8s, OverallIterations: 8, TraceHistogramMax: 8, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 727 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 608 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 472 IncrementalHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 136 mSDtfsCounter, 472 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 491 GetRequests, 373 SyntacticMatches, 6 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 57.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 24 PreInvPairs, 46 NumberOfFragments, 581 HoareAnnotationTreeSize, 24 FomulaSimplifications, 84 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 242 ConstructedInterpolants, 0 QuantifiedInterpolants, 1033 SizeOfPredicates, 14 NumberOfNonLiveVariables, 818 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 347/454 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: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((c == 1 && k <= 5) && y == 1) && 0 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) || ((((2 == y && 1 < k) && k <= 5) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 2 == c)) || ((((3 == y && k <= 5) && 2 < k) && 3 == c) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || (((((c <= 5 && 5 == y) && 4 < k) && k <= 5) && 5 <= c) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || ((((0 <= k && c == 0) && y == 0) && k <= 5) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || ((((y == 4 && 3 < k) && k <= 5) && c == 4) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) RESULT: Ultimate proved your program to be correct! [2021-11-23 02:07:05,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_addc8578-5904-4f11-9680-32c1c243cb62/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE