./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9 --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 6733f5cb9fc343de68240fd800b3186de8da0c1fcb51c576de9d571eaa34d1a7 --- 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-6b4ec56 [2022-11-20 20:24:22,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:24:22,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:24:22,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:24:22,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:24:22,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:24:22,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:24:22,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:24:22,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:24:22,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:24:22,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:24:22,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:24:22,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:24:22,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:24:22,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:24:22,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:24:22,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:24:22,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:24:22,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:24:22,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:24:22,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:24:22,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:24:22,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:24:22,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:24:22,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:24:22,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:24:22,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:24:22,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:24:22,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:24:22,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:24:22,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:24:22,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:24:22,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:24:22,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:24:22,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:24:22,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:24:22,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:24:22,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:24:22,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:24:22,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:24:22,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:24:22,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:24:22,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:24:22,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:24:22,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:24:22,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:24:22,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:24:22,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:24:22,328 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:24:22,328 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:24:22,328 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:24:22,328 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:24:22,328 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:24:22,329 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:24:22,329 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:24:22,329 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:24:22,329 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:24:22,329 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:24:22,330 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:24:22,330 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:24:22,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:24:22,331 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:24:22,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:24:22,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:24:22,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:24:22,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:24:22,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:24:22,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:24:22,332 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:24:22,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:24:22,333 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:24:22,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:24:22,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:24:22,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:24:22,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:24:22,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:24:22,334 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:24:22,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:24:22,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:24:22,335 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:24:22,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:24:22,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:24:22,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:24:22,335 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_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6733f5cb9fc343de68240fd800b3186de8da0c1fcb51c576de9d571eaa34d1a7 [2022-11-20 20:24:22,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:24:22,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:24:22,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:24:22,676 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:24:22,677 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:24:22,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c [2022-11-20 20:24:25,884 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:24:26,170 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:24:26,170 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c [2022-11-20 20:24:26,178 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/data/bfdac63d3/1da598f07dec404880013e9df41ac123/FLAG73ba5c843 [2022-11-20 20:24:26,200 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/data/bfdac63d3/1da598f07dec404880013e9df41ac123 [2022-11-20 20:24:26,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:24:26,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:24:26,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:24:26,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:24:26,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:24:26,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2123e4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26, skipping insertion in model container [2022-11-20 20:24:26,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:24:26,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:24:26,420 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_bf7477f1-6085-45de-bb49-e5961412d3e4/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c[712,725] [2022-11-20 20:24:26,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:24:26,445 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:24:26,455 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_bf7477f1-6085-45de-bb49-e5961412d3e4/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c[712,725] [2022-11-20 20:24:26,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:24:26,473 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:24:26,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26 WrapperNode [2022-11-20 20:24:26,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:24:26,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:24:26,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:24:26,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:24:26,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,512 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2022-11-20 20:24:26,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:24:26,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:24:26,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:24:26,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:24:26,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,536 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:24:26,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:24:26,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:24:26,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:24:26,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (1/1) ... [2022-11-20 20:24:26,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:24:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:26,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:24:26,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:24:26,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:24:26,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:24:26,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:24:26,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:24:26,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 20:24:26,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 20:24:26,690 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:24:26,693 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:24:26,867 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:24:26,884 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:24:26,884 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:24:26,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:24:26 BoogieIcfgContainer [2022-11-20 20:24:26,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:24:26,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:24:26,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:24:26,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:24:26,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:24:26" (1/3) ... [2022-11-20 20:24:26,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f909cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:24:26, skipping insertion in model container [2022-11-20 20:24:26,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:26" (2/3) ... [2022-11-20 20:24:26,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f909cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:24:26, skipping insertion in model container [2022-11-20 20:24:26,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:24:26" (3/3) ... [2022-11-20 20:24:26,907 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound10.c [2022-11-20 20:24:26,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:24:26,930 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:24:27,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:24:27,009 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;@6938ecd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:24:27,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:24:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:24:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:24:27,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:27,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:24:27,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2109616992, now seen corresponding path program 1 times [2022-11-20 20:24:27,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:24:27,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862814535] [2022-11-20 20:24:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:27,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:24:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:27,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:24:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862814535] [2022-11-20 20:24:27,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862814535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:27,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:24:27,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:24:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137465645] [2022-11-20 20:24:27,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:27,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:24:27,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:24:27,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:24:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:24:27,284 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-11-20 20:24:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:27,322 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-20 20:24:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:24:27,328 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 [2022-11-20 20:24:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:27,340 INFO L225 Difference]: With dead ends: 27 [2022-11-20 20:24:27,347 INFO L226 Difference]: Without dead ends: 12 [2022-11-20 20:24:27,350 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 [2022-11-20 20:24:27,354 INFO L413 NwaCegarLoop]: 14 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, 14 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 [2022-11-20 20:24:27,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:24:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-20 20:24:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-20 20:24:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 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) [2022-11-20 20:24:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-20 20:24:27,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-11-20 20:24:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:27,451 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-20 20:24:27,451 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) [2022-11-20 20:24:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-20 20:24:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:24:27,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:27,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:27,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:24:27,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:27,454 INFO L85 PathProgramCache]: Analyzing trace with hash 574117089, now seen corresponding path program 1 times [2022-11-20 20:24:27,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:24:27,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274584317] [2022-11-20 20:24:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:27,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:24:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:27,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:24:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274584317] [2022-11-20 20:24:27,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274584317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:27,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:24:27,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:24:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025349686] [2022-11-20 20:24:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:27,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:24:27,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:24:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:24:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:24:27,655 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-20 20:24:27,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:27,691 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-20 20:24:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:24:27,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-11-20 20:24:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:27,692 INFO L225 Difference]: With dead ends: 21 [2022-11-20 20:24:27,692 INFO L226 Difference]: Without dead ends: 14 [2022-11-20 20:24:27,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:24:27,694 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:27,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:24:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-20 20:24:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-20 20:24:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 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) [2022-11-20 20:24:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-20 20:24:27,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2022-11-20 20:24:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:27,699 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-20 20:24:27,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-20 20:24:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-20 20:24:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:24:27,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:27,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:27,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:24:27,701 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:27,702 INFO L85 PathProgramCache]: Analyzing trace with hash 575904549, now seen corresponding path program 1 times [2022-11-20 20:24:27,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:24:27,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991182943] [2022-11-20 20:24:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:27,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:24:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:24:27,723 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:24:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:24:27,774 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:24:27,774 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:24:27,776 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 20:24:27,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:24:27,783 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 20:24:27,787 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 20:24:27,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:24:27 BoogieIcfgContainer [2022-11-20 20:24:27,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 20:24:27,829 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 20:24:27,829 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 20:24:27,829 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 20:24:27,830 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:24:26" (3/4) ... [2022-11-20 20:24:27,834 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 20:24:27,834 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 20:24:27,836 INFO L158 Benchmark]: Toolchain (without parser) took 1624.16ms. Allocated memory is still 190.8MB. Free memory was 159.6MB in the beginning and 105.1MB in the end (delta: 54.4MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2022-11-20 20:24:27,836 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory was 87.7MB in the beginning and 87.7MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:24:27,837 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.51ms. Allocated memory is still 190.8MB. Free memory was 159.6MB in the beginning and 149.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 20:24:27,842 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.16ms. Allocated memory is still 190.8MB. Free memory was 149.2MB in the beginning and 148.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:24:27,846 INFO L158 Benchmark]: Boogie Preprocessor took 26.19ms. Allocated memory is still 190.8MB. Free memory was 148.1MB in the beginning and 147.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:24:27,849 INFO L158 Benchmark]: RCFGBuilder took 347.02ms. Allocated memory is still 190.8MB. Free memory was 147.0MB in the beginning and 136.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 20:24:27,850 INFO L158 Benchmark]: TraceAbstraction took 935.73ms. Allocated memory is still 190.8MB. Free memory was 135.5MB in the beginning and 105.1MB in the end (delta: 30.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-20 20:24:27,851 INFO L158 Benchmark]: Witness Printer took 5.64ms. Allocated memory is still 190.8MB. Free memory is still 105.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:24:27,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory was 87.7MB in the beginning and 87.7MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 257.51ms. Allocated memory is still 190.8MB. Free memory was 159.6MB in the beginning and 149.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.16ms. Allocated memory is still 190.8MB. Free memory was 149.2MB in the beginning and 148.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.19ms. Allocated memory is still 190.8MB. Free memory was 148.1MB in the beginning and 147.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 347.02ms. Allocated memory is still 190.8MB. Free memory was 147.0MB in the beginning and 136.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 935.73ms. Allocated memory is still 190.8MB. Free memory was 135.5MB in the beginning and 105.1MB in the end (delta: 30.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Witness Printer took 5.64ms. Allocated memory is still 190.8MB. Free memory is still 105.1MB. There was no memory consumed. 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 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0, r=0] [L32] EXPR counter++ VAL [counter=1, counter++=0, r=0] [L32] COND TRUE counter++<10 [L33] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 25 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-20 20:24:27,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9 --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 6733f5cb9fc343de68240fd800b3186de8da0c1fcb51c576de9d571eaa34d1a7 --- 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-6b4ec56 [2022-11-20 20:24:30,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:24:30,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:24:30,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:24:30,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:24:30,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:24:30,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:24:30,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:24:30,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:24:30,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:24:30,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:24:30,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:24:30,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:24:30,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:24:30,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:24:30,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:24:30,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:24:30,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:24:30,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:24:30,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:24:30,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:24:30,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:24:30,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:24:30,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:24:30,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:24:30,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:24:30,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:24:30,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:24:30,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:24:30,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:24:30,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:24:30,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:24:30,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:24:30,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:24:30,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:24:30,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:24:30,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:24:30,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:24:30,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:24:30,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:24:30,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:24:30,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-20 20:24:30,463 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:24:30,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:24:30,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:24:30,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:24:30,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:24:30,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:24:30,465 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:24:30,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:24:30,466 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:24:30,466 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:24:30,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:24:30,467 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:24:30,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:24:30,468 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:24:30,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:24:30,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:24:30,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:24:30,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:24:30,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:24:30,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:24:30,469 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:24:30,470 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:24:30,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:24:30,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:24:30,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:24:30,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:24:30,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:24:30,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:24:30,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:24:30,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:24:30,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:24:30,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:24:30,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:24:30,473 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:24:30,473 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:30,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:24:30,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:24:30,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:24:30,474 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6733f5cb9fc343de68240fd800b3186de8da0c1fcb51c576de9d571eaa34d1a7 [2022-11-20 20:24:30,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:24:30,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:24:30,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:24:30,844 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:24:30,844 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:24:30,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c [2022-11-20 20:24:34,071 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:24:34,261 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:24:34,262 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c [2022-11-20 20:24:34,268 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/data/5d6df0ba0/e795475831d0451fab46753078210bd8/FLAGbea28485d [2022-11-20 20:24:34,289 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/data/5d6df0ba0/e795475831d0451fab46753078210bd8 [2022-11-20 20:24:34,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:24:34,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:24:34,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:24:34,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:24:34,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:24:34,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3264721a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34, skipping insertion in model container [2022-11-20 20:24:34,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:24:34,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:24:34,565 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_bf7477f1-6085-45de-bb49-e5961412d3e4/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c[712,725] [2022-11-20 20:24:34,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:24:34,616 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:24:34,632 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_bf7477f1-6085-45de-bb49-e5961412d3e4/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound10.c[712,725] [2022-11-20 20:24:34,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:24:34,665 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:24:34,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34 WrapperNode [2022-11-20 20:24:34,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:24:34,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:24:34,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:24:34,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:24:34,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,716 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2022-11-20 20:24:34,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:24:34,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:24:34,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:24:34,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:24:34,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,755 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:24:34,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:24:34,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:24:34,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:24:34,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (1/1) ... [2022-11-20 20:24:34,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:24:34,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:24:34,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:24:34,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:24:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:24:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:24:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:24:34,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:24:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 20:24:34,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 20:24:34,937 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:24:34,940 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:24:36,189 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:24:36,195 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:24:36,196 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:24:36,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:24:36 BoogieIcfgContainer [2022-11-20 20:24:36,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:24:36,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:24:36,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:24:36,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:24:36,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:24:34" (1/3) ... [2022-11-20 20:24:36,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363bac60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:24:36, skipping insertion in model container [2022-11-20 20:24:36,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:24:34" (2/3) ... [2022-11-20 20:24:36,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363bac60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:24:36, skipping insertion in model container [2022-11-20 20:24:36,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:24:36" (3/3) ... [2022-11-20 20:24:36,227 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound10.c [2022-11-20 20:24:36,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:24:36,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:24:36,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:24:36,336 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;@2331deab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:24:36,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:24:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:24:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:24:36,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:36,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:36,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2022-11-20 20:24:36,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:36,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909829210] [2022-11-20 20:24:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:36,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:36,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:36,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:36,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 20:24:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:36,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 20:24:36,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:36,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:24:36,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909829210] [2022-11-20 20:24:36,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909829210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:36,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:24:36,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:24:36,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967089717] [2022-11-20 20:24:36,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:36,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:24:36,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:24:37,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:24:37,039 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-20 20:24:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:37,059 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-11-20 20:24:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:24:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2022-11-20 20:24:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:37,070 INFO L225 Difference]: With dead ends: 32 [2022-11-20 20:24:37,071 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 20:24:37,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:24:37,079 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:37,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:24:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 20:24:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-20 20:24:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 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) [2022-11-20 20:24:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-20 20:24:37,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-11-20 20:24:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:37,124 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-20 20:24:37,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-11-20 20:24:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-20 20:24:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:24:37,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:37,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:37,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:37,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:37,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:37,343 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2022-11-20 20:24:37,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:37,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760742979] [2022-11-20 20:24:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:37,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:37,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:37,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:37,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 20:24:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:37,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:24:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:24:37,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:24:37,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:37,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760742979] [2022-11-20 20:24:37,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760742979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:37,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:24:37,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:24:37,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744649412] [2022-11-20 20:24:37,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:37,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:24:37,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:24:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:24:37,844 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-20 20:24:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:38,885 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-20 20:24:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:24:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-20 20:24:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:38,888 INFO L225 Difference]: With dead ends: 22 [2022-11-20 20:24:38,889 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 20:24:38,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:24:38,891 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:38,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:24:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 20:24:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 20:24:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 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) [2022-11-20 20:24:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-20 20:24:38,897 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-11-20 20:24:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:38,897 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-20 20:24:38,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-20 20:24:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-20 20:24:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:24:38,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:38,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:24:38,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:39,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:39,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2022-11-20 20:24:39,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:39,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867107391] [2022-11-20 20:24:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:39,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:24:39,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:39,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:24:39,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 20:24:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:24:39,527 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:24:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:24:39,924 ERROR L250 FreeRefinementEngine]: Caught unknown exception: Invalid model [2022-11-20 20:24:39,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1701019149] [2022-11-20 20:24:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:39,925 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:39,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:39,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:39,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf7477f1-6085-45de-bb49-e5961412d3e4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-20 20:24:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:24:40,884 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:24:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat