./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c2c79fc7da9b912a6d0a49c4075c07cb5e82cc2dc05ee24d0b572e0ac73f733 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:32:42,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:32:42,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:32:42,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:32:42,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:32:42,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:32:42,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:32:42,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:32:42,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:32:42,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:32:42,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:32:42,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:32:42,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:32:42,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:32:42,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:32:42,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:32:42,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:32:42,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:32:42,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:32:42,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:32:42,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:32:42,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:32:42,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:32:42,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:32:42,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:32:42,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:32:42,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:32:42,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:32:42,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:32:42,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:32:42,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:32:42,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:32:42,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:32:42,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:32:42,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:32:42,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:32:42,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:32:42,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:32:42,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:32:42,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:32:42,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:32:42,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:32:42,297 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:32:42,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:32:42,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:32:42,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:32:42,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:32:42,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:32:42,298 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:32:42,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:32:42,299 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:32:42,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:32:42,299 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:32:42,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:32:42,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:32:42,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:32:42,299 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:32:42,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:32:42,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:32:42,300 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:32:42,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:32:42,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:32:42,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:32:42,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:32:42,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:32:42,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:32:42,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:32:42,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:32:42,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:32:42,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:32:42,302 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:32:42,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:32:42,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:32:42,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:32:42,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:32:42,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:32:42,302 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:32:42,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:32:42,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:32:42,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:32:42,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:32:42,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:32:42,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:32:42,303 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_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c2c79fc7da9b912a6d0a49c4075c07cb5e82cc2dc05ee24d0b572e0ac73f733 [2022-12-14 10:32:42,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:32:42,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:32:42,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:32:42,521 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:32:42,522 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:32:42,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/s2iff.c [2022-12-14 10:32:45,152 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:32:45,301 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:32:45,302 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/sv-benchmarks/c/array-fpi/s2iff.c [2022-12-14 10:32:45,307 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/data/4d2f24867/674575d444c34f19a1447ae2a5c712b4/FLAG3acb602e8 [2022-12-14 10:32:45,318 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/data/4d2f24867/674575d444c34f19a1447ae2a5c712b4 [2022-12-14 10:32:45,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:32:45,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:32:45,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:32:45,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:32:45,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:32:45,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@591d0dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45, skipping insertion in model container [2022-12-14 10:32:45,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:32:45,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:32:45,469 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_36eabf5b-74e4-4587-a151-30ebe1e84ed1/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2022-12-14 10:32:45,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:32:45,496 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:32:45,509 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_36eabf5b-74e4-4587-a151-30ebe1e84ed1/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2022-12-14 10:32:45,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:32:45,530 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:32:45,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45 WrapperNode [2022-12-14 10:32:45,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:32:45,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:32:45,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:32:45,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:32:45,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,565 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-12-14 10:32:45,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:32:45,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:32:45,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:32:45,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:32:45,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,588 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:32:45,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:32:45,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:32:45,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:32:45,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (1/1) ... [2022-12-14 10:32:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:32:45,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:45,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:32:45,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:32:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:32:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:32:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:32:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:32:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:32:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:32:45,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:32:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:32:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:32:45,713 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:32:45,714 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:32:45,831 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:32:45,876 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:32:45,876 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 10:32:45,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:32:45 BoogieIcfgContainer [2022-12-14 10:32:45,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:32:45,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:32:45,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:32:45,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:32:45,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:32:45" (1/3) ... [2022-12-14 10:32:45,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8a7f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:32:45, skipping insertion in model container [2022-12-14 10:32:45,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:32:45" (2/3) ... [2022-12-14 10:32:45,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8a7f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:32:45, skipping insertion in model container [2022-12-14 10:32:45,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:32:45" (3/3) ... [2022-12-14 10:32:45,888 INFO L112 eAbstractionObserver]: Analyzing ICFG s2iff.c [2022-12-14 10:32:45,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:32:45,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:32:45,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:32:45,952 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;@6f8a2ef1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:32:45,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:32:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:32:45,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:45,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:32:45,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:45,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:45,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2022-12-14 10:32:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:32:45,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546172370] [2022-12-14 10:32:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:32:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:32:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:32:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:46,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:32:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546172370] [2022-12-14 10:32:46,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546172370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:32:46,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:32:46,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:32:46,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542176405] [2022-12-14 10:32:46,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:32:46,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:32:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:32:46,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:32:46,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:32:46,184 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:46,215 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-12-14 10:32:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:32:46,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:32:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:46,223 INFO L225 Difference]: With dead ends: 18 [2022-12-14 10:32:46,223 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 10:32:46,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:32:46,227 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:46,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:32:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 10:32:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 10:32:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 10:32:46,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-12-14 10:32:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:46,249 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 10:32:46,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:46,250 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 10:32:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:32:46,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:46,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:32:46,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2022-12-14 10:32:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:32:46,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999481391] [2022-12-14 10:32:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:32:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:32:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:32:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:32:46,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:32:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999481391] [2022-12-14 10:32:46,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999481391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:32:46,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:32:46,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:32:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525280480] [2022-12-14 10:32:46,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:32:46,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:32:46,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:32:46,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:32:46,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:32:46,351 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:46,373 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2022-12-14 10:32:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:32:46,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:32:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:46,373 INFO L225 Difference]: With dead ends: 12 [2022-12-14 10:32:46,373 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 10:32:46,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:32:46,375 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:46,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:32:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 10:32:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 10:32:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-12-14 10:32:46,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-12-14 10:32:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:46,377 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-12-14 10:32:46,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-12-14 10:32:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:32:46,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:46,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:46,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:32:46,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:46,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:46,379 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2022-12-14 10:32:46,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:32:46,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816499298] [2022-12-14 10:32:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:32:46,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:32:46,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:32:46,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248383992] [2022-12-14 10:32:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:32:46,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:46,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:46,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:46,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:32:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:32:46,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:32:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:46,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 10:32:46,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:32:46,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 10:32:46,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 10:32:46,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2022-12-14 10:32:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:46,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:46,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 10:32:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:46,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:32:46,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816499298] [2022-12-14 10:32:46,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:32:46,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248383992] [2022-12-14 10:32:46,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248383992] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:46,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523857444] [2022-12-14 10:32:46,894 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 10:32:46,894 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:32:46,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:32:46,901 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:32:46,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:32:46,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,001 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 10:32:47,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 10:32:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 10:32:47,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 10:32:47,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 10:32:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:47,329 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-12-14 10:32:47,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 448 treesize of output 436 [2022-12-14 10:32:47,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:32:47,460 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 10:32:47,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 10:32:47,503 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 10:32:47,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 10:32:47,571 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 10:32:47,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-12-14 10:32:47,630 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 10:32:47,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-12-14 10:32:47,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:32:47,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '138#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (* 3 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 10:32:47,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:32:47,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:32:47,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-14 10:32:47,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149548516] [2022-12-14 10:32:47,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:47,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 10:32:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:32:47,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 10:32:47,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:32:47,976 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:48,061 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-12-14 10:32:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:32:48,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 10:32:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:48,062 INFO L225 Difference]: With dead ends: 15 [2022-12-14 10:32:48,063 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 10:32:48,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:32:48,064 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:48,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:32:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 10:32:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-12-14 10:32:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-12-14 10:32:48,068 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-12-14 10:32:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:48,068 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-12-14 10:32:48,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-12-14 10:32:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:32:48,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:48,069 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:48,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:32:48,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:48,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:48,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2022-12-14 10:32:48,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:32:48,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044331677] [2022-12-14 10:32:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:32:48,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:32:48,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:32:48,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019065208] [2022-12-14 10:32:48,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:32:48,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:48,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:48,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:48,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:32:48,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:32:48,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:32:48,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:48,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:48,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:32:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044331677] [2022-12-14 10:32:48,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:32:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019065208] [2022-12-14 10:32:48,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019065208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:48,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954641832] [2022-12-14 10:32:48,506 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 10:32:48,506 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:32:48,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:32:48,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:32:48,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:32:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,579 INFO L321 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-12-14 10:32:48,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 54 [2022-12-14 10:32:48,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,610 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:32:48,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 10:32:48,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,689 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 10:32:48,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 10:32:48,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 10:32:48,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:48,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:48,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:48,907 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-12-14 10:32:48,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 34 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 26 case distinctions, treesize of input 443 treesize of output 437 [2022-12-14 10:32:49,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:32:49,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:49,062 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 10:32:49,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 10:32:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:49,106 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 10:32:49,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 10:32:49,178 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 10:32:49,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-12-14 10:32:49,226 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 10:32:49,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-12-14 10:32:49,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:32:49,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '239#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (* 3 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 10:32:49,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:32:49,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:32:49,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-12-14 10:32:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183517586] [2022-12-14 10:32:49,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:49,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:32:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:32:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:32:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:32:49,518 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:49,572 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-12-14 10:32:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:32:49,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:32:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:49,573 INFO L225 Difference]: With dead ends: 20 [2022-12-14 10:32:49,573 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 10:32:49,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:32:49,575 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:49,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:32:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 10:32:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2022-12-14 10:32:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-14 10:32:49,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2022-12-14 10:32:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:49,578 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-14 10:32:49,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-14 10:32:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:32:49,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:49,579 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:49,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:32:49,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:49,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:49,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2022-12-14 10:32:49,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:32:49,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614106062] [2022-12-14 10:32:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:32:49,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:32:49,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:32:49,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529251476] [2022-12-14 10:32:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:32:49,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:49,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:49,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:49,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:32:49,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:32:49,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:32:49,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:32:49,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:32:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:49,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:32:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:32:49,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:32:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614106062] [2022-12-14 10:32:49,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:32:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529251476] [2022-12-14 10:32:49,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529251476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:32:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380182162] [2022-12-14 10:32:49,990 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 10:32:49,990 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:32:49,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:32:49,991 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:32:49,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:32:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,054 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 10:32:50,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 10:32:50,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 10:32:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-12-14 10:32:50,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 37 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 10:32:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:32:50,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:50,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:50,245 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-12-14 10:32:50,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 34 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 26 case distinctions, treesize of input 443 treesize of output 437 [2022-12-14 10:32:50,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:32:50,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:50,362 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 10:32:50,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 10:32:50,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:32:50,397 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 10:32:50,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 10:32:50,458 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 10:32:50,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-12-14 10:32:50,499 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 10:32:50,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-12-14 10:32:50,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:32:50,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '350#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (* 3 ~N~0) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 10:32:50,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:32:50,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:32:50,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 10:32:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669177519] [2022-12-14 10:32:50,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:32:50,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:32:50,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:32:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:32:50,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:32:50,810 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:32:50,860 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-12-14 10:32:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:32:50,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:32:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:32:50,861 INFO L225 Difference]: With dead ends: 14 [2022-12-14 10:32:50,861 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 10:32:50,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:32:50,862 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:32:50,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:32:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 10:32:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 10:32:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-12-14 10:32:50,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2022-12-14 10:32:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:32:50,864 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-12-14 10:32:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:32:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-12-14 10:32:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:32:50,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:32:50,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:32:50,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:32:51,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:51,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:32:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:32:51,068 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2022-12-14 10:32:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:32:51,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510858238] [2022-12-14 10:32:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:32:51,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:32:51,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:32:51,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341330766] [2022-12-14 10:32:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:32:51,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:51,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:32:51,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:32:51,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:32:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:32:51,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:32:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:32:51,203 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:32:51,203 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:32:51,204 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 10:32:51,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:32:51,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:32:51,411 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-12-14 10:32:51,416 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 10:32:51,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 10:32:51 BoogieIcfgContainer [2022-12-14 10:32:51,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 10:32:51,447 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 10:32:51,447 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 10:32:51,447 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 10:32:51,448 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:32:45" (3/4) ... [2022-12-14 10:32:51,449 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 10:32:51,474 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eabf5b-74e4-4587-a151-30ebe1e84ed1/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 10:32:51,474 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 10:32:51,474 INFO L158 Benchmark]: Toolchain (without parser) took 6153.84ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 120.5MB in the beginning and 158.2MB in the end (delta: -37.7MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2022-12-14 10:32:51,475 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 157.3MB. Free memory is still 110.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:32:51,475 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.27ms. Allocated memory is still 157.3MB. Free memory was 120.0MB in the beginning and 109.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:32:51,475 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.83ms. Allocated memory is still 157.3MB. Free memory was 109.5MB in the beginning and 107.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:32:51,475 INFO L158 Benchmark]: Boogie Preprocessor took 24.62ms. Allocated memory is still 157.3MB. Free memory was 107.9MB in the beginning and 106.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:32:51,475 INFO L158 Benchmark]: RCFGBuilder took 287.84ms. Allocated memory is still 157.3MB. Free memory was 106.4MB in the beginning and 91.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 10:32:51,475 INFO L158 Benchmark]: TraceAbstraction took 5564.69ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 91.1MB in the beginning and 160.3MB in the end (delta: -69.2MB). Peak memory consumption was 516.5kB. Max. memory is 16.1GB. [2022-12-14 10:32:51,476 INFO L158 Benchmark]: Witness Printer took 27.22ms. Allocated memory is still 226.5MB. Free memory was 160.3MB in the beginning and 158.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:32:51,477 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 157.3MB. Free memory is still 110.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.27ms. Allocated memory is still 157.3MB. Free memory was 120.0MB in the beginning and 109.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.83ms. Allocated memory is still 157.3MB. Free memory was 109.5MB in the beginning and 107.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.62ms. Allocated memory is still 157.3MB. Free memory was 107.9MB in the beginning and 106.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 287.84ms. Allocated memory is still 157.3MB. Free memory was 106.4MB in the beginning and 91.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5564.69ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 91.1MB in the beginning and 160.3MB in the end (delta: -69.2MB). Peak memory consumption was 516.5kB. Max. memory is 16.1GB. * Witness Printer took 27.22ms. Allocated memory is still 226.5MB. Free memory was 160.3MB in the beginning and 158.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [a={-1:0}, i=0, N=2, sum={4:0}] [L32] COND TRUE i