./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s3iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s3iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur --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 b56a60c804a92437263513baa7bf1eed2ace53771b0d034fa5a91f323be2ca59 --- 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-38b53e6 [2022-11-26 00:56:45,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:56:45,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:56:45,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:56:45,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:56:45,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:56:45,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:56:45,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:56:45,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:56:45,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:56:45,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:56:45,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:56:45,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:56:45,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:56:45,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:56:45,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:56:45,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:56:45,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:56:45,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:56:45,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:56:45,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:56:45,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:56:45,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:56:45,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:56:45,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:56:45,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:56:45,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:56:45,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:56:45,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:56:45,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:56:45,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:56:45,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:56:45,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:56:45,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:56:45,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:56:45,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:56:45,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:56:45,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:56:45,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:56:45,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:56:45,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:56:45,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:56:45,328 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:56:45,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:56:45,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:56:45,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:56:45,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:56:45,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:56:45,331 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:56:45,331 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:56:45,331 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:56:45,332 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:56:45,332 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:56:45,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:56:45,333 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:56:45,333 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:56:45,333 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:56:45,334 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:56:45,334 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:56:45,334 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:56:45,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:56:45,335 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:56:45,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:56:45,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:56:45,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:56:45,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:56:45,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:56:45,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:56:45,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:56:45,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:56:45,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:56:45,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:56:45,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:56:45,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:56:45,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:56:45,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:56:45,340 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:56:45,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:56:45,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:56:45,341 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:56:45,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:56:45,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:56:45,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:56:45,342 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_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b56a60c804a92437263513baa7bf1eed2ace53771b0d034fa5a91f323be2ca59 [2022-11-26 00:56:45,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:56:45,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:56:45,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:56:45,706 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:56:45,706 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:56:45,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-fpi/s3iff.c [2022-11-26 00:56:48,902 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:56:49,104 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:56:49,105 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/sv-benchmarks/c/array-fpi/s3iff.c [2022-11-26 00:56:49,111 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/data/38a0fd9d1/e055a6016c34437aa12b670fcfb559bb/FLAG62f24bbf3 [2022-11-26 00:56:49,126 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/data/38a0fd9d1/e055a6016c34437aa12b670fcfb559bb [2022-11-26 00:56:49,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:56:49,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:56:49,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:56:49,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:56:49,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:56:49,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e2def3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49, skipping insertion in model container [2022-11-26 00:56:49,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:56:49,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:56:49,312 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_fe012710-3b04-4638-82b3-6f5a752ad994/sv-benchmarks/c/array-fpi/s3iff.c[588,601] [2022-11-26 00:56:49,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:56:49,341 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:56:49,351 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_fe012710-3b04-4638-82b3-6f5a752ad994/sv-benchmarks/c/array-fpi/s3iff.c[588,601] [2022-11-26 00:56:49,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:56:49,372 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:56:49,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49 WrapperNode [2022-11-26 00:56:49,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:56:49,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:56:49,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:56:49,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:56:49,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,413 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-11-26 00:56:49,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:56:49,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:56:49,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:56:49,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:56:49,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,441 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:56:49,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:56:49,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:56:49,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:56:49,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (1/1) ... [2022-11-26 00:56:49,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:56:49,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:49,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:56:49,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:56:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:56:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:56:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:56:49,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:56:49,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:56:49,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:56:49,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:56:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:56:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:56:49,633 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:56:49,638 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:56:49,871 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:56:49,990 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:56:49,990 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:56:49,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:56:49 BoogieIcfgContainer [2022-11-26 00:56:49,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:56:50,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:56:50,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:56:50,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:56:50,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:56:49" (1/3) ... [2022-11-26 00:56:50,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc515e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:56:50, skipping insertion in model container [2022-11-26 00:56:50,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:49" (2/3) ... [2022-11-26 00:56:50,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc515e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:56:50, skipping insertion in model container [2022-11-26 00:56:50,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:56:49" (3/3) ... [2022-11-26 00:56:50,027 INFO L112 eAbstractionObserver]: Analyzing ICFG s3iff.c [2022-11-26 00:56:50,076 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:56:50,077 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:56:50,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:56:50,132 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;@1444b15b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:56:50,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:56:50,135 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) [2022-11-26 00:56:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:56:50,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:50,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:56:50,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:56:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2022-11-26 00:56:50,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:50,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330436509] [2022-11-26 00:56:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:50,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:50,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:50,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330436509] [2022-11-26 00:56:50,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330436509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:50,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:56:50,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:56:50,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059323195] [2022-11-26 00:56:50,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:56:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:56:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:56:50,538 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) [2022-11-26 00:56:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:50,608 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-26 00:56:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:56:50,613 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 [2022-11-26 00:56:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:50,622 INFO L225 Difference]: With dead ends: 18 [2022-11-26 00:56:50,623 INFO L226 Difference]: Without dead ends: 8 [2022-11-26 00:56:50,626 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 [2022-11-26 00:56:50,633 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:50,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:56:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-26 00:56:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-26 00:56:50,663 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) [2022-11-26 00:56:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-26 00:56:50,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-11-26 00:56:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:50,667 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-26 00:56:50,668 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) [2022-11-26 00:56:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-26 00:56:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:56:50,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:50,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:50,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:56:50,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:56:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2022-11-26 00:56:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:50,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896756276] [2022-11-26 00:56:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:50,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:50,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896756276] [2022-11-26 00:56:50,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896756276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:50,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:56:50,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:56:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884843105] [2022-11-26 00:56:50,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:56:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:56:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:56:50,814 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) [2022-11-26 00:56:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:50,841 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2022-11-26 00:56:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:56:50,842 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 [2022-11-26 00:56:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:50,843 INFO L225 Difference]: With dead ends: 12 [2022-11-26 00:56:50,843 INFO L226 Difference]: Without dead ends: 9 [2022-11-26 00:56:50,844 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 [2022-11-26 00:56:50,845 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 [2022-11-26 00:56:50,846 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] [2022-11-26 00:56:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-26 00:56:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-26 00:56:50,849 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) [2022-11-26 00:56:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-26 00:56:50,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-26 00:56:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:50,851 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-26 00:56:50,851 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) [2022-11-26 00:56:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-26 00:56:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:56:50,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:50,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:50,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:56:50,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:56:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:50,853 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2022-11-26 00:56:50,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:50,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205450442] [2022-11-26 00:56:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:50,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:50,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:56:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815214148] [2022-11-26 00:56:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:50,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:50,884 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:50,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:56:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:51,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:56:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:51,076 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 [2022-11-26 00:56:51,091 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 [2022-11-26 00:56:51,131 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 [2022-11-26 00:56:51,245 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 [2022-11-26 00:56:51,379 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 43 treesize of output 27 [2022-11-26 00:56:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:51,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:51,549 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 [2022-11-26 00:56:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:51,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:51,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205450442] [2022-11-26 00:56:51,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:56:51,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815214148] [2022-11-26 00:56:51,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815214148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592340487] [2022-11-26 00:56:51,753 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:56:51,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:51,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:51,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:51,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:51,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:51,857 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:56:51,859 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 [2022-11-26 00:56:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:51,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:51,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:51,992 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:56:51,993 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 [2022-11-26 00:56:52,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,048 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 [2022-11-26 00:56:52,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,126 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 [2022-11-26 00:56:52,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:52,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:52,432 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-26 00:56:52,433 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 [2022-11-26 00:56:52,569 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 [2022-11-26 00:56:52,623 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:56:52,623 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 [2022-11-26 00:56:52,683 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:56:52,684 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 [2022-11-26 00:56:52,792 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:56:52,793 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 [2022-11-26 00:56:52,903 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:56:52,904 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 [2022-11-26 00:56:52,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:53,464 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#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 [2022-11-26 00:56:53,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:53,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:56:53,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-26 00:56:53,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668660616] [2022-11-26 00:56:53,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:53,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:56:53,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:56:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:56:53,467 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) [2022-11-26 00:56:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:53,598 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-11-26 00:56:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:56:53,600 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 [2022-11-26 00:56:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:53,601 INFO L225 Difference]: With dead ends: 15 [2022-11-26 00:56:53,601 INFO L226 Difference]: Without dead ends: 12 [2022-11-26 00:56:53,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:56:53,603 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 [2022-11-26 00:56:53,603 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] [2022-11-26 00:56:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-26 00:56:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-26 00:56:53,607 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) [2022-11-26 00:56:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-26 00:56:53,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-26 00:56:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:53,608 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-26 00:56:53,608 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) [2022-11-26 00:56:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-26 00:56:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:56:53,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:53,609 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:53,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:53,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:53,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:56:53,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:53,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2022-11-26 00:56:53,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:53,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697321796] [2022-11-26 00:56:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:53,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:53,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:56:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306454437] [2022-11-26 00:56:53,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:56:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:53,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:53,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:56:53,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:56:53,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:53,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:56:53,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:53,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:53,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:53,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697321796] [2022-11-26 00:56:53,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:56:53,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306454437] [2022-11-26 00:56:53,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306454437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701421013] [2022-11-26 00:56:53,984 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:56:53,984 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:53,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:53,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:53,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:54,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,088 INFO L321 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-11-26 00:56:54,089 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 [2022-11-26 00:56:54,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,132 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:56:54,132 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 [2022-11-26 00:56:54,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,256 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:56:54,257 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 [2022-11-26 00:56:54,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,315 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 [2022-11-26 00:56:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:54,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:54,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:54,568 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:56:54,569 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 [2022-11-26 00:56:54,698 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 [2022-11-26 00:56:54,743 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:56:54,743 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 [2022-11-26 00:56:54,784 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:56:54,784 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 [2022-11-26 00:56:54,886 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:56:54,887 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 [2022-11-26 00:56:54,954 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:56:54,955 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 [2022-11-26 00:56:55,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:55,440 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#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 [2022-11-26 00:56:55,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:55,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:56:55,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-26 00:56:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207714946] [2022-11-26 00:56:55,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:55,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:56:55,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:55,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:56:55,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:56:55,442 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) [2022-11-26 00:56:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:55,525 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-11-26 00:56:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:56:55,527 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 [2022-11-26 00:56:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:55,527 INFO L225 Difference]: With dead ends: 20 [2022-11-26 00:56:55,527 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:56:55,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:56:55,528 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 [2022-11-26 00:56:55,529 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] [2022-11-26 00:56:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:56:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2022-11-26 00:56:55,532 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) [2022-11-26 00:56:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-26 00:56:55,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2022-11-26 00:56:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:55,532 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-26 00:56:55,533 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) [2022-11-26 00:56:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-26 00:56:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:56:55,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:55,533 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:55,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:55,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:55,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:56:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2022-11-26 00:56:55,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759809275] [2022-11-26 00:56:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:55,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:55,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:56:55,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213426824] [2022-11-26 00:56:55,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:56:55,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:55,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:55,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:55,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:56:55,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:56:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:56:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:55,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:55,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759809275] [2022-11-26 00:56:55,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:56:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213426824] [2022-11-26 00:56:55,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213426824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540737050] [2022-11-26 00:56:55,915 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:56:55,915 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:55,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:55,916 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:55,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:55,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:55,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,018 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:56:56,018 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 [2022-11-26 00:56:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,043 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 [2022-11-26 00:56:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,064 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 [2022-11-26 00:56:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,119 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 [2022-11-26 00:56:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:56:56,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:56,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:56:56,388 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:56:56,389 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 [2022-11-26 00:56:56,518 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 [2022-11-26 00:56:56,564 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:56:56,564 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 [2022-11-26 00:56:56,613 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:56:56,614 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 [2022-11-26 00:56:56,692 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:56:56,693 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 [2022-11-26 00:56:56,773 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:56:56,774 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 [2022-11-26 00:56:56,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:56:57,182 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#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 [2022-11-26 00:56:57,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:57,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:56:57,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-26 00:56:57,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890444365] [2022-11-26 00:56:57,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:57,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:56:57,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:56:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:56:57,185 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) [2022-11-26 00:56:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:57,275 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-26 00:56:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:56:57,278 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 [2022-11-26 00:56:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:57,278 INFO L225 Difference]: With dead ends: 14 [2022-11-26 00:56:57,279 INFO L226 Difference]: Without dead ends: 11 [2022-11-26 00:56:57,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:56:57,280 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 [2022-11-26 00:56:57,280 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] [2022-11-26 00:56:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-26 00:56:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-26 00:56:57,283 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) [2022-11-26 00:56:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-26 00:56:57,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2022-11-26 00:56:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:57,284 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-26 00:56:57,284 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) [2022-11-26 00:56:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-26 00:56:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:56:57,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:57,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:57,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:57,486 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:56:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2022-11-26 00:56:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:57,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427745122] [2022-11-26 00:56:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:57,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:56:57,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825667329] [2022-11-26 00:56:57,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:56:57,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:57,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:57,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:57,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:56:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:56:57,613 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:56:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:56:57,705 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:56:57,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:56:57,706 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:56:57,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:57,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:56:57,912 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-26 00:56:57,915 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:56:57,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:56:57 BoogieIcfgContainer [2022-11-26 00:56:57,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:56:57,939 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:56:57,939 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:56:57,939 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:56:57,940 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:56:49" (3/4) ... [2022-11-26 00:56:57,942 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 00:56:57,985 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe012710-3b04-4638-82b3-6f5a752ad994/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:56:57,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:56:57,986 INFO L158 Benchmark]: Toolchain (without parser) took 8856.03ms. Allocated memory was 142.6MB in the beginning and 207.6MB in the end (delta: 65.0MB). Free memory was 87.9MB in the beginning and 171.0MB in the end (delta: -83.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:56:57,986 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory was 90.0MB in the beginning and 89.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:56:57,986 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.29ms. Allocated memory is still 142.6MB. Free memory was 87.7MB in the beginning and 76.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:56:57,987 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.16ms. Allocated memory is still 142.6MB. Free memory was 76.7MB in the beginning and 75.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:56:57,987 INFO L158 Benchmark]: Boogie Preprocessor took 27.05ms. Allocated memory is still 142.6MB. Free memory was 75.1MB in the beginning and 73.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:56:57,987 INFO L158 Benchmark]: RCFGBuilder took 553.93ms. Allocated memory is still 142.6MB. Free memory was 73.8MB in the beginning and 58.9MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-26 00:56:57,988 INFO L158 Benchmark]: TraceAbstraction took 7937.47ms. Allocated memory was 142.6MB in the beginning and 207.6MB in the end (delta: 65.0MB). Free memory was 58.1MB in the beginning and 173.1MB in the end (delta: -115.0MB). Peak memory consumption was 4.0MB. Max. memory is 16.1GB. [2022-11-26 00:56:57,989 INFO L158 Benchmark]: Witness Printer took 46.17ms. Allocated memory is still 207.6MB. Free memory was 173.1MB in the beginning and 171.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:56:57,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory was 90.0MB in the beginning and 89.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.29ms. Allocated memory is still 142.6MB. Free memory was 87.7MB in the beginning and 76.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.16ms. Allocated memory is still 142.6MB. Free memory was 76.7MB in the beginning and 75.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.05ms. Allocated memory is still 142.6MB. Free memory was 75.1MB in the beginning and 73.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 553.93ms. Allocated memory is still 142.6MB. Free memory was 73.8MB in the beginning and 58.9MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 7937.47ms. Allocated memory was 142.6MB in the beginning and 207.6MB in the end (delta: 65.0MB). Free memory was 58.1MB in the beginning and 173.1MB in the end (delta: -115.0MB). Peak memory consumption was 4.0MB. Max. memory is 16.1GB. * Witness Printer took 46.17ms. Allocated memory is still 207.6MB. Free memory was 173.1MB in the beginning and 171.0MB 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