./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/sqrt1-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh --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 5a667cf640b9cf5657756f4ca44157e13471ed71aebfaf7ff11f9d5251db37ae --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:43:14,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:43:14,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:43:14,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:43:14,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:43:14,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:43:15,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:43:15,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:43:15,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:43:15,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:43:15,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:43:15,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:43:15,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:43:15,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:43:15,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:43:15,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:43:15,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:43:15,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:43:15,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:43:15,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:43:15,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:43:15,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:43:15,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:43:15,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:43:15,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:43:15,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:43:15,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:43:15,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:43:15,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:43:15,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:43:15,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:43:15,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:43:15,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:43:15,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:43:15,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:43:15,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:43:15,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:43:15,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:43:15,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:43:15,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:43:15,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:43:15,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:43:15,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:43:15,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:43:15,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:43:15,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:43:15,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:43:15,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:43:15,052 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:43:15,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:43:15,052 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:43:15,053 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:43:15,053 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:43:15,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:43:15,053 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:43:15,053 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:43:15,054 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:43:15,054 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:43:15,054 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:43:15,054 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:43:15,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:43:15,055 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:43:15,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:43:15,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:43:15,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:43:15,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:43:15,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:43:15,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:43:15,056 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:43:15,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:43:15,057 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:43:15,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:43:15,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:43:15,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:43:15,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:43:15,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:43:15,058 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:43:15,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:43:15,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:43:15,059 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:43:15,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:43:15,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:43:15,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:43:15,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a667cf640b9cf5657756f4ca44157e13471ed71aebfaf7ff11f9d5251db37ae [2022-12-14 15:43:15,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:43:15,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:43:15,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:43:15,272 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:43:15,273 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:43:15,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench/sqrt1-ll.c [2022-12-14 15:43:17,888 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:43:18,049 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:43:18,050 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/sv-benchmarks/c/nla-digbench/sqrt1-ll.c [2022-12-14 15:43:18,056 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/data/9cf323e95/d70e4680748c498abe1c83eb9f743158/FLAG92c85d9e9 [2022-12-14 15:43:18,066 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/data/9cf323e95/d70e4680748c498abe1c83eb9f743158 [2022-12-14 15:43:18,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:43:18,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:43:18,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:43:18,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:43:18,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:43:18,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c07e1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18, skipping insertion in model container [2022-12-14 15:43:18,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:43:18,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:43:18,192 WARN L237 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_6a983362-fc17-4125-b8cc-b71068ca7176/sv-benchmarks/c/nla-digbench/sqrt1-ll.c[520,533] [2022-12-14 15:43:18,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:43:18,209 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:43:18,220 WARN L237 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_6a983362-fc17-4125-b8cc-b71068ca7176/sv-benchmarks/c/nla-digbench/sqrt1-ll.c[520,533] [2022-12-14 15:43:18,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:43:18,238 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:43:18,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18 WrapperNode [2022-12-14 15:43:18,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:43:18,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:43:18,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:43:18,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:43:18,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,263 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2022-12-14 15:43:18,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:43:18,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:43:18,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:43:18,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:43:18,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,276 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:43:18,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:43:18,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:43:18,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:43:18,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (1/1) ... [2022-12-14 15:43:18,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:43:18,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:43:18,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:43:18,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:43:18,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:43:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:43:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:43:18,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:43:18,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 15:43:18,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 15:43:18,403 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:43:18,404 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:43:18,487 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:43:18,501 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:43:18,501 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:43:18,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:43:18 BoogieIcfgContainer [2022-12-14 15:43:18,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:43:18,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:43:18,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:43:18,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:43:18,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:43:18" (1/3) ... [2022-12-14 15:43:18,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545572d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:43:18, skipping insertion in model container [2022-12-14 15:43:18,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:18" (2/3) ... [2022-12-14 15:43:18,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545572d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:43:18, skipping insertion in model container [2022-12-14 15:43:18,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:43:18" (3/3) ... [2022-12-14 15:43:18,512 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll.c [2022-12-14 15:43:18,527 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:43:18,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:43:18,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:43:18,570 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@430b74e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:43:18,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:43:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 15:43:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:43:18,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:43:18,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:43:18,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:43:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:43:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1808342220, now seen corresponding path program 1 times [2022-12-14 15:43:18,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:43:18,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406438098] [2022-12-14 15:43:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:18,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:43:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:43:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:43:18,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:43:18,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406438098] [2022-12-14 15:43:18,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406438098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:43:18,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:43:18,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:43:18,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028652914] [2022-12-14 15:43:18,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:43:18,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 15:43:18,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:43:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 15:43:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 15:43:18,731 INFO L87 Difference]: Start difference. First operand has 17 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2022-12-14 15:43:18,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:43:18,758 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2022-12-14 15:43:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 15:43:18,760 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2022-12-14 15:43:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:43:18,767 INFO L225 Difference]: With dead ends: 33 [2022-12-14 15:43:18,767 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 15:43:18,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 15:43:18,772 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:43:18,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:43:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 15:43:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 15:43:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 15:43:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-12-14 15:43:18,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 6 [2022-12-14 15:43:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:43:18,799 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-12-14 15:43:18,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2022-12-14 15:43:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-12-14 15:43:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:43:18,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:43:18,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:43:18,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:43:18,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:43:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:43:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1850079411, now seen corresponding path program 1 times [2022-12-14 15:43:18,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:43:18,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628040466] [2022-12-14 15:43:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:18,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:43:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:43:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:43:18,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:43:18,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628040466] [2022-12-14 15:43:18,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628040466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:43:18,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:43:18,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:43:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071844127] [2022-12-14 15:43:18,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:43:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:43:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:43:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:43:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:43:18,932 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. 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) [2022-12-14 15:43:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:43:18,997 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-12-14 15:43:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:43:18,997 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 [2022-12-14 15:43:18,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:43:18,998 INFO L225 Difference]: With dead ends: 29 [2022-12-14 15:43:18,998 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 15:43:18,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:43:19,000 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:43:19,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:43:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 15:43:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-12-14 15:43:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 15:43:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-12-14 15:43:19,013 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 6 [2022-12-14 15:43:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:43:19,014 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-12-14 15:43:19,014 INFO L496 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) [2022-12-14 15:43:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-12-14 15:43:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:43:19,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:43:19,015 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:43:19,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:43:19,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:43:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:43:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash -79511534, now seen corresponding path program 1 times [2022-12-14 15:43:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:43:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255325607] [2022-12-14 15:43:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:19,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:43:19,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:43:19,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329267495] [2022-12-14 15:43:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:19,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:43:19,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:43:19,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:43:19,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:43:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:43:19,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:43:19,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:43:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:43:19,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:43:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:43:19,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:43:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255325607] [2022-12-14 15:43:19,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:43:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329267495] [2022-12-14 15:43:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329267495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:43:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944112101] [2022-12-14 15:43:19,333 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:43:19,333 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:43:19,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:43:19,339 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:43:19,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:43:19,422 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-12-14 15:43:19,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:43:19,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [944112101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:43:19,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:43:19,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-12-14 15:43:19,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853035608] [2022-12-14 15:43:19,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:43:19,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:43:19,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:43:19,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:43:19,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:43:19,596 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:43:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:43:19,672 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-12-14 15:43:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:43:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 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 11 [2022-12-14 15:43:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:43:19,673 INFO L225 Difference]: With dead ends: 33 [2022-12-14 15:43:19,674 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 15:43:19,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:43:19,675 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:43:19,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:43:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 15:43:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 15:43:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 15:43:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-12-14 15:43:19,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2022-12-14 15:43:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:43:19,682 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-12-14 15:43:19,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:43:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-12-14 15:43:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 15:43:19,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:43:19,683 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:43:19,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:43:19,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:43:19,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:43:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:43:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672272, now seen corresponding path program 1 times [2022-12-14 15:43:19,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:43:19,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545917886] [2022-12-14 15:43:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:19,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:43:19,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:43:19,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411113603] [2022-12-14 15:43:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:19,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:43:19,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:43:19,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:43:19,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:43:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:43:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:43:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:43:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:43:20,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:43:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 15:43:20,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:43:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545917886] [2022-12-14 15:43:20,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:43:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411113603] [2022-12-14 15:43:20,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411113603] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:43:20,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:43:20,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-12-14 15:43:20,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115665427] [2022-12-14 15:43:20,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:43:20,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:43:20,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:43:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:43:20,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:43:20,049 INFO L87 Difference]: Start difference. First operand 28 states and 34 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:43:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:43:20,088 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-12-14 15:43:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:43:20,088 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-12-14 15:43:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:43:20,089 INFO L225 Difference]: With dead ends: 34 [2022-12-14 15:43:20,089 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 15:43:20,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:43:20,091 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:43:20,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:43:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 15:43:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 15:43:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 15:43:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-12-14 15:43:20,098 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 23 [2022-12-14 15:43:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:43:20,098 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-12-14 15:43:20,099 INFO L496 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:43:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-12-14 15:43:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 15:43:20,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:43:20,100 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:43:20,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 15:43:20,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 15:43:20,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:43:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:43:20,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1725011793, now seen corresponding path program 2 times [2022-12-14 15:43:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:43:20,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503476063] [2022-12-14 15:43:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:20,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:43:20,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:43:20,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377394926] [2022-12-14 15:43:20,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:43:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:43:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:43:20,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:43:20,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:43:20,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:43:20,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:43:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:43:20,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:43:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:43:20,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:43:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 15:43:20,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:43:20,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503476063] [2022-12-14 15:43:20,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:43:20,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377394926] [2022-12-14 15:43:20,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377394926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:43:20,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577703374] [2022-12-14 15:43:20,692 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:43:20,692 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:43:20,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:43:20,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:43:20,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:43:21,816 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 15:43:21,820 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:43:22,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '768#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:43:22,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:43:22,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:43:22,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-12-14 15:43:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132296263] [2022-12-14 15:43:22,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 15:43:22,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:43:22,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:43:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:43:22,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:43:22,073 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:43:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:43:22,226 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-12-14 15:43:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:43:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 28 [2022-12-14 15:43:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:43:22,228 INFO L225 Difference]: With dead ends: 52 [2022-12-14 15:43:22,228 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 15:43:22,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-12-14 15:43:22,229 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:43:22,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:43:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 15:43:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-12-14 15:43:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 15:43:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-12-14 15:43:22,236 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 28 [2022-12-14 15:43:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:43:22,236 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-12-14 15:43:22,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:43:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-12-14 15:43:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 15:43:22,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:43:22,237 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2022-12-14 15:43:22,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 15:43:22,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:43:22,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:43:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:43:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1113827469, now seen corresponding path program 3 times [2022-12-14 15:43:22,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:43:22,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823350270] [2022-12-14 15:43:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:22,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:43:22,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:43:22,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012741900] [2022-12-14 15:43:22,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:43:22,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:43:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:43:22,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:43:22,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:43:22,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:43:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:43:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 15:43:22,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:43:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 67 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 15:43:29,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:43:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 15:43:29,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:43:29,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823350270] [2022-12-14 15:43:29,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:43:29,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012741900] [2022-12-14 15:43:29,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012741900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:43:29,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448366570] [2022-12-14 15:43:29,468 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:43:29,469 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:43:29,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:43:29,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:43:29,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:43:30,350 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 15:43:30,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:43:30,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1229#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:43:30,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:43:30,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:43:30,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2022-12-14 15:43:30,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976871316] [2022-12-14 15:43:30,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 15:43:30,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:43:30,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:43:30,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:43:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=271, Unknown=1, NotChecked=0, Total=342 [2022-12-14 15:43:30,765 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 12 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:43:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:43:30,890 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-12-14 15:43:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:43:30,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-12-14 15:43:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:43:30,891 INFO L225 Difference]: With dead ends: 45 [2022-12-14 15:43:30,891 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 15:43:30,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=78, Invalid=301, Unknown=1, NotChecked=0, Total=380 [2022-12-14 15:43:30,893 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:43:30,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:43:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 15:43:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 15:43:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:43:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 15:43:30,894 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2022-12-14 15:43:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:43:30,894 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 15:43:30,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:43:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 15:43:30,895 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 15:43:30,897 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 15:43:30,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:43:31,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:43:31,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 15:43:31,675 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 15:43:31,675 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-12-14 15:43:31,675 INFO L895 garLoopResultBuilder]: At program point L29-2(lines 29 41) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-12-14 15:43:31,675 INFO L895 garLoopResultBuilder]: At program point L29-3(lines 29 41) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-12-14 15:43:31,676 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-12-14 15:43:31,676 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 15:43:31,676 INFO L899 garLoopResultBuilder]: For program point L32(lines 29 41) no Hoare annotation was computed. [2022-12-14 15:43:31,676 INFO L895 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-12-14 15:43:31,676 INFO L895 garLoopResultBuilder]: At program point L30-1(line 30) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-12-14 15:43:31,676 INFO L902 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: true [2022-12-14 15:43:31,676 INFO L895 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-12-14 15:43:31,676 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-12-14 15:43:31,676 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-12-14 15:43:31,676 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-12-14 15:43:31,676 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-12-14 15:43:31,676 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2022-12-14 15:43:31,676 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-12-14 15:43:31,678 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-12-14 15:43:31,680 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 15:43:31,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:43:31 BoogieIcfgContainer [2022-12-14 15:43:31,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 15:43:31,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 15:43:31,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 15:43:31,689 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 15:43:31,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:43:18" (3/4) ... [2022-12-14 15:43:31,691 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 15:43:31,695 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-12-14 15:43:31,697 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-12-14 15:43:31,697 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-12-14 15:43:31,697 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 15:43:31,697 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 15:43:31,716 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 15:43:31,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 15:43:31,716 INFO L158 Benchmark]: Toolchain (without parser) took 13646.96ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 111.2MB in the beginning and 121.7MB in the end (delta: -10.5MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2022-12-14 15:43:31,716 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 142.6MB. Free memory was 116.1MB in the beginning and 116.1MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:43:31,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.31ms. Allocated memory is still 142.6MB. Free memory was 111.2MB in the beginning and 100.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:43:31,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.15ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 99.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 15:43:31,717 INFO L158 Benchmark]: Boogie Preprocessor took 14.16ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 98.5MB in the end (delta: 901.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:43:31,717 INFO L158 Benchmark]: RCFGBuilder took 224.35ms. Allocated memory is still 142.6MB. Free memory was 98.5MB in the beginning and 87.4MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 15:43:31,717 INFO L158 Benchmark]: TraceAbstraction took 13182.88ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 86.8MB in the beginning and 123.8MB in the end (delta: -37.1MB). Peak memory consumption was 77.0MB. Max. memory is 16.1GB. [2022-12-14 15:43:31,718 INFO L158 Benchmark]: Witness Printer took 27.15ms. Allocated memory is still 172.0MB. Free memory was 123.8MB in the beginning and 121.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 15:43:31,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 142.6MB. Free memory was 116.1MB in the beginning and 116.1MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.31ms. Allocated memory is still 142.6MB. Free memory was 111.2MB in the beginning and 100.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.15ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 99.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.16ms. Allocated memory is still 142.6MB. Free memory was 99.4MB in the beginning and 98.5MB in the end (delta: 901.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 224.35ms. Allocated memory is still 142.6MB. Free memory was 98.5MB in the beginning and 87.4MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13182.88ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 86.8MB in the beginning and 123.8MB in the end (delta: -37.1MB). Peak memory consumption was 77.0MB. Max. memory is 16.1GB. * Witness Printer took 27.15ms. Allocated memory is still 172.0MB. Free memory was 123.8MB in the beginning and 121.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.1s, OverallIterations: 6, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 65 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 41 mSDsluCounter, 200 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 111 mSDsCounter, 37 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 477 IncrementalHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 37 mSolverCounterUnsat, 89 mSDtfsCounter, 477 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 316 GetRequests, 246 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 32 PreInvPairs, 54 NumberOfFragments, 142 HoareAnnotationTreeSize, 32 FomulaSimplifications, 100 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1175 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 124 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 860 SizeOfPredicates, 12 NumberOfNonLiveVariables, 299 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 382/396 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: OVERALL_TIME: 0.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 15, TOOLS_QUANTIFIERELIM_TIME: 0.0s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 25, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 48, DAG_COMPRESSION_RETAINED_NODES: 29, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && s * 4 == t * t + 2 * t + 1 RESULT: Ultimate proved your program to be correct! [2022-12-14 15:43:31,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a983362-fc17-4125-b8cc-b71068ca7176/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE