./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7 --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 ee2daa1dfbe0d64b8ede4504c07bcca5b6f9048af3b92abbef97ab933225d42e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:53:03,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:53:03,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:53:03,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:53:03,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:53:03,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:53:03,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:53:03,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:53:03,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:53:03,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:53:03,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:53:03,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:53:03,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:53:03,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:53:03,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:53:03,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:53:03,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:53:03,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:53:03,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:53:03,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:53:03,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:53:03,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:53:03,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:53:03,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:53:03,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:53:03,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:53:03,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:53:03,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:53:03,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:53:03,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:53:03,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:53:03,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:53:03,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:53:03,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:53:03,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:53:03,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:53:03,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:53:03,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:53:03,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:53:03,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:53:03,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:53:03,212 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:53:03,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:53:03,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:53:03,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:53:03,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:53:03,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:53:03,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:53:03,241 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:53:03,241 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:53:03,241 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:53:03,241 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:53:03,241 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:53:03,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:53:03,242 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:53:03,242 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:53:03,242 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:53:03,242 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:53:03,243 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:53:03,243 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:53:03,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:53:03,244 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:53:03,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:53:03,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:53:03,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:53:03,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:53:03,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:53:03,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:53:03,245 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:53:03,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:53:03,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:53:03,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:53:03,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:53:03,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:53:03,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:53:03,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:53:03,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:53:03,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:53:03,247 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:53:03,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:53:03,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:53:03,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:53:03,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:53:03,248 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee2daa1dfbe0d64b8ede4504c07bcca5b6f9048af3b92abbef97ab933225d42e [2021-11-25 17:53:03,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:53:03,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:53:03,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:53:03,526 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:53:03,526 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:53:03,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound10.c [2021-11-25 17:53:03,603 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/data/682b1510a/87a82d5541f742508bb08b9980f6a1b9/FLAG57b30e5b6 [2021-11-25 17:53:04,169 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:53:04,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound10.c [2021-11-25 17:53:04,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/data/682b1510a/87a82d5541f742508bb08b9980f6a1b9/FLAG57b30e5b6 [2021-11-25 17:53:04,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/data/682b1510a/87a82d5541f742508bb08b9980f6a1b9 [2021-11-25 17:53:04,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:53:04,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:53:04,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:53:04,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:53:04,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:53:04,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a1744d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04, skipping insertion in model container [2021-11-25 17:53:04,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:53:04,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:53:04,814 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound10.c[537,550] [2021-11-25 17:53:04,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:53:04,846 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:53:04,863 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound10.c[537,550] [2021-11-25 17:53:04,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:53:04,897 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:53:04,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04 WrapperNode [2021-11-25 17:53:04,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:53:04,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:53:04,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:53:04,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:53:04,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,938 INFO L137 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2021-11-25 17:53:04,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:53:04,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:53:04,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:53:04,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:53:04,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:53:04,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:53:04,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:53:04,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:53:04,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (1/1) ... [2021-11-25 17:53:04,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:53:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:05,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:53:05,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:53:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:53:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 17:53:05,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 17:53:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:53:05,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:53:05,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:53:05,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 17:53:05,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 17:53:05,142 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:53:05,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:53:05,288 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:53:05,311 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:53:05,312 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 17:53:05,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:53:05 BoogieIcfgContainer [2021-11-25 17:53:05,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:53:05,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:53:05,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:53:05,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:53:05,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:53:04" (1/3) ... [2021-11-25 17:53:05,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6e7564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:53:05, skipping insertion in model container [2021-11-25 17:53:05,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:04" (2/3) ... [2021-11-25 17:53:05,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6e7564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:53:05, skipping insertion in model container [2021-11-25 17:53:05,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:53:05" (3/3) ... [2021-11-25 17:53:05,322 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound10.c [2021-11-25 17:53:05,327 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:53:05,327 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:53:05,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:53:05,395 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:53:05,395 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:53:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 17:53:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 17:53:05,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:05,424 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:53:05,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:53:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash 727522484, now seen corresponding path program 1 times [2021-11-25 17:53:05,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:53:05,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864985273] [2021-11-25 17:53:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:05,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:53:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 17:53:05,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:53:05,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864985273] [2021-11-25 17:53:05,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864985273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:53:05,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:53:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:53:05,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544915583] [2021-11-25 17:53:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:53:05,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 17:53:05,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:53:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 17:53:05,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 17:53:05,771 INFO L87 Difference]: Start difference. First operand has 23 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 17:53:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:05,814 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-11-25 17:53:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 17:53:05,816 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2021-11-25 17:53:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:05,823 INFO L225 Difference]: With dead ends: 35 [2021-11-25 17:53:05,824 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 17:53:05,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 17:53:05,830 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:05,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:53:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 17:53:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 17:53:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 17:53:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-11-25 17:53:05,869 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 26 [2021-11-25 17:53:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:05,871 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-11-25 17:53:05,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 17:53:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-11-25 17:53:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 17:53:05,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:05,874 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:53:05,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:53:05,875 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:53:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash 671128121, now seen corresponding path program 1 times [2021-11-25 17:53:05,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:53:05,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107468239] [2021-11-25 17:53:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:05,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:53:05,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:53:05,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013968548] [2021-11-25 17:53:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:05,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:05,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:05,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:05,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:53:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 17:53:06,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 17:53:06,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:53:06,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:53:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107468239] [2021-11-25 17:53:06,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 17:53:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013968548] [2021-11-25 17:53:06,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013968548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:53:06,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:53:06,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:53:06,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339148033] [2021-11-25 17:53:06,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:53:06,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:53:06,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:53:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:53:06,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:53:06,434 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 17:53:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:06,512 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-25 17:53:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:53:06,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2021-11-25 17:53:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:06,514 INFO L225 Difference]: With dead ends: 31 [2021-11-25 17:53:06,515 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 17:53:06,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:53:06,520 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:06,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 80 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:53:06,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 17:53:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-25 17:53:06,533 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) [2021-11-25 17:53:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-25 17:53:06,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 26 [2021-11-25 17:53:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:06,535 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-25 17:53:06,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 17:53:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-25 17:53:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 17:53:06,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:06,537 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:53:06,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:53:06,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:06,751 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:53:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1013354018, now seen corresponding path program 1 times [2021-11-25 17:53:06,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:53:06,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719907337] [2021-11-25 17:53:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:06,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:53:06,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 17:53:06,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62794861] [2021-11-25 17:53:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:06,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:06,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:06,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84228974-3a16-49bb-ab4f-87c89677434a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process