./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s3iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-6b4ec56 [2022-11-20 21:12:02,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:12:02,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:12:02,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:12:02,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:12:02,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:12:02,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:12:02,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:12:02,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:12:02,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:12:02,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:12:02,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:12:02,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:12:02,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:12:02,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:12:02,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:12:02,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:12:02,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:12:02,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:12:02,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:12:02,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:12:02,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:12:02,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:12:02,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:12:02,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:12:02,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:12:02,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:12:02,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:12:02,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:12:02,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:12:02,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:12:02,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:12:02,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:12:02,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:12:02,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:12:02,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:12:02,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:12:02,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:12:02,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:12:02,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:12:02,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:12:02,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:12:02,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:12:02,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:12:02,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:12:02,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:12:02,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:12:02,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:12:02,419 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:12:02,419 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:12:02,420 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:12:02,420 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:12:02,420 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:12:02,420 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:12:02,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:12:02,420 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:12:02,421 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:12:02,421 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:12:02,421 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:12:02,421 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:12:02,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:12:02,422 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:12:02,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:12:02,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:12:02,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:12:02,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:12:02,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:12:02,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:12:02,423 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:12:02,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:12:02,426 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:12:02,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:12:02,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:12:02,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:12:02,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:12:02,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:12:02,427 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:12:02,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:12:02,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:12:02,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:12:02,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:12:02,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:12:02,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:12:02,430 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_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b56a60c804a92437263513baa7bf1eed2ace53771b0d034fa5a91f323be2ca59 [2022-11-20 21:12:02,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:12:02,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:12:02,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:12:02,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:12:02,796 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:12:02,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-fpi/s3iff.c [2022-11-20 21:12:05,864 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:12:06,088 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:12:06,089 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/sv-benchmarks/c/array-fpi/s3iff.c [2022-11-20 21:12:06,096 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/data/c73f7eb44/456e66fce5dc4e4eb8d796e111ed9770/FLAGe16b96170 [2022-11-20 21:12:06,109 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/data/c73f7eb44/456e66fce5dc4e4eb8d796e111ed9770 [2022-11-20 21:12:06,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:12:06,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:12:06,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:12:06,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:12:06,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:12:06,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d99871e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06, skipping insertion in model container [2022-11-20 21:12:06,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:12:06,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:12:06,327 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_80dfe229-84f9-4c50-b970-6ddebfe11779/sv-benchmarks/c/array-fpi/s3iff.c[588,601] [2022-11-20 21:12:06,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:12:06,373 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:12:06,431 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_80dfe229-84f9-4c50-b970-6ddebfe11779/sv-benchmarks/c/array-fpi/s3iff.c[588,601] [2022-11-20 21:12:06,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:12:06,486 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:12:06,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06 WrapperNode [2022-11-20 21:12:06,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:12:06,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:12:06,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:12:06,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:12:06,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,553 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-11-20 21:12:06,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:12:06,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:12:06,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:12:06,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:12:06,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:12:06,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:12:06,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:12:06,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:12:06,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (1/1) ... [2022-11-20 21:12:06,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:12:06,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:12:06,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:12:06,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:12:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:12:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:12:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:12:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 21:12:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:12:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:12:06,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:12:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:12:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:12:06,763 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:12:06,765 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:12:06,968 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:12:07,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:12:07,055 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 21:12:07,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:12:07 BoogieIcfgContainer [2022-11-20 21:12:07,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:12:07,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:12:07,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:12:07,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:12:07,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:12:06" (1/3) ... [2022-11-20 21:12:07,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d403292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:12:07, skipping insertion in model container [2022-11-20 21:12:07,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:12:06" (2/3) ... [2022-11-20 21:12:07,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d403292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:12:07, skipping insertion in model container [2022-11-20 21:12:07,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:12:07" (3/3) ... [2022-11-20 21:12:07,075 INFO L112 eAbstractionObserver]: Analyzing ICFG s3iff.c [2022-11-20 21:12:07,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:12:07,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:12:07,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:12:07,145 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;@5883a6dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:12:07,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:12:07,162 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) [2022-11-20 21:12:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:12:07,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:12:07,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:12:07,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:12:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:12:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2022-11-20 21:12:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:12:07,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225152837] [2022-11-20 21:12:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:07,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:12:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:12:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:12:07,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:12:07,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225152837] [2022-11-20 21:12:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225152837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:12:07,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:12:07,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:12:07,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025676280] [2022-11-20 21:12:07,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:12:07,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:12:07,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:12:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:12:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:12:07,590 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) [2022-11-20 21:12:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:12:07,632 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-20 21:12:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:12:07,635 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 [2022-11-20 21:12:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:12:07,642 INFO L225 Difference]: With dead ends: 18 [2022-11-20 21:12:07,643 INFO L226 Difference]: Without dead ends: 8 [2022-11-20 21:12:07,646 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 [2022-11-20 21:12:07,649 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 [2022-11-20 21:12:07,651 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] [2022-11-20 21:12:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-20 21:12:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-20 21:12:07,681 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) [2022-11-20 21:12:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-20 21:12:07,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-11-20 21:12:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:12:07,684 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-20 21:12:07,684 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) [2022-11-20 21:12:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-20 21:12:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:12:07,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:12:07,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:12:07,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:12:07,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:12:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:12:07,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2022-11-20 21:12:07,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:12:07,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677881121] [2022-11-20 21:12:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:07,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:12:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:12:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:12:07,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:12:07,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677881121] [2022-11-20 21:12:07,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677881121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:12:07,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:12:07,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:12:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127889862] [2022-11-20 21:12:07,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:12:07,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:12:07,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:12:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:12:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:12:07,847 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) [2022-11-20 21:12:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:12:07,891 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2022-11-20 21:12:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:12:07,893 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 [2022-11-20 21:12:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:12:07,893 INFO L225 Difference]: With dead ends: 12 [2022-11-20 21:12:07,893 INFO L226 Difference]: Without dead ends: 9 [2022-11-20 21:12:07,894 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 [2022-11-20 21:12:07,896 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 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 [2022-11-20 21:12:07,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 4 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:12:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-20 21:12:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-20 21:12:07,905 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) [2022-11-20 21:12:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-20 21:12:07,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-20 21:12:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:12:07,909 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-20 21:12:07,909 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) [2022-11-20 21:12:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-20 21:12:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:12:07,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:12:07,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:12:07,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:12:07,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:12:07,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:12:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2022-11-20 21:12:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:12:07,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49164996] [2022-11-20 21:12:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:07,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:12:07,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:12:07,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324687331] [2022-11-20 21:12:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:07,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:12:07,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:12:07,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:12:08,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:12:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:12:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 21:12:08,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:12:08,193 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 [2022-11-20 21:12:08,211 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 [2022-11-20 21:12:08,286 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 [2022-11-20 21:12:08,437 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 [2022-11-20 21:12:08,540 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 [2022-11-20 21:12:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:12:08,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:12:08,657 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 [2022-11-20 21:12:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:12:08,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:12:08,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49164996] [2022-11-20 21:12:08,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:12:08,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324687331] [2022-11-20 21:12:08,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324687331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:12:08,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968437333] [2022-11-20 21:12:08,810 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 21:12:08,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:12:08,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:12:08,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:12:08,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:12:08,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:08,900 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 21:12:08,901 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 [2022-11-20 21:12:08,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,021 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 21:12:09,021 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 [2022-11-20 21:12:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,053 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 [2022-11-20 21:12:09,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,123 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 [2022-11-20 21:12:09,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:12:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:09,471 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-20 21:12:09,472 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 [2022-11-20 21:12:09,586 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 [2022-11-20 21:12:09,639 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 21:12:09,639 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 [2022-11-20 21:12:09,711 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 21:12:09,711 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 [2022-11-20 21:12:09,813 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 21:12:09,814 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 [2022-11-20 21:12:09,916 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 21:12:09,916 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 [2022-11-20 21:12:09,956 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:12:10,445 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 [2022-11-20 21:12:10,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:12:10,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:12:10,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-20 21:12:10,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382135781] [2022-11-20 21:12:10,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:12:10,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:12:10,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:12:10,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:12:10,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:12:10,448 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) [2022-11-20 21:12:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:12:10,515 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-11-20 21:12:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:12:10,516 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 [2022-11-20 21:12:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:12:10,517 INFO L225 Difference]: With dead ends: 15 [2022-11-20 21:12:10,517 INFO L226 Difference]: Without dead ends: 12 [2022-11-20 21:12:10,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:12:10,519 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:12:10,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-11-20 21:12:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-20 21:12:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-20 21:12:10,522 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) [2022-11-20 21:12:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-20 21:12:10,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-20 21:12:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:12:10,525 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-20 21:12:10,526 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) [2022-11-20 21:12:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-20 21:12:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:12:10,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:12:10,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:12:10,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:12:10,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:12:10,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:12:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:12:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2022-11-20 21:12:10,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:12:10,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593446387] [2022-11-20 21:12:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:10,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:12:10,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:12:10,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869514157] [2022-11-20 21:12:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:12:10,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:12:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:12:10,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:12:10,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:12:10,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:12:10,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:12:10,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:12:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:12:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:12:10,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:12:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:12:10,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:12:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593446387] [2022-11-20 21:12:10,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:12:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869514157] [2022-11-20 21:12:10,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869514157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:12:10,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76717522] [2022-11-20 21:12:10,941 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 21:12:10,941 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:12:10,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:12:10,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:12:10,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:12:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,072 INFO L321 Elim1Store]: treesize reduction 71, result has 30.4 percent of original size [2022-11-20 21:12:11,072 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 [2022-11-20 21:12:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,118 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 21:12:11,119 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 [2022-11-20 21:12:11,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,257 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 21:12:11,258 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 [2022-11-20 21:12:11,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,326 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 [2022-11-20 21:12:11,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:11,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:12:11,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:12:11,564 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-20 21:12:11,565 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 [2022-11-20 21:12:11,707 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 [2022-11-20 21:12:11,753 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 21:12:11,754 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 [2022-11-20 21:12:11,792 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 21:12:11,793 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 30 treesize of output 33 [2022-11-20 21:12:11,889 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 21:12:11,890 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 [2022-11-20 21:12:11,949 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 21:12:11,949 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 [2022-11-20 21:12:12,032 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:12:12,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '237#(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 [2022-11-20 21:12:12,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:12:12,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:12:12,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-20 21:12:12,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396147676] [2022-11-20 21:12:12,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:12:12,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:12:12,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:12:12,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:12:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:12:12,457 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) [2022-11-20 21:12:12,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:12:12,539 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-11-20 21:12:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:12:12,540 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 [2022-11-20 21:12:12,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:12:12,540 INFO L225 Difference]: With dead ends: 20 [2022-11-20 21:12:12,540 INFO L226 Difference]: Without dead ends: 14 [2022-11-20 21:12:12,541 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 [2022-11-20 21:12:12,542 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:12:12,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:12:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-20 21:12:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2022-11-20 21:12:12,546 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) [2022-11-20 21:12:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-20 21:12:12,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2022-11-20 21:12:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:12:12,547 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-20 21:12:12,547 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) [2022-11-20 21:12:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-20 21:12:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:12:12,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:12:12,548 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:12:12,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:12:12,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:12:12,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:12:12,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:12:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2022-11-20 21:12:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:12:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627608567] [2022-11-20 21:12:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:12,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:12:12,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:12:12,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587773341] [2022-11-20 21:12:12,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:12:12,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:12:12,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:12:12,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:12:12,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:12:12,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:12:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:12:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:12:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:12:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:12:12,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:12:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:12:12,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:12:12,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627608567] [2022-11-20 21:12:12,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:12:12,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587773341] [2022-11-20 21:12:12,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587773341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:12:12,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740956279] [2022-11-20 21:12:12,947 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 21:12:12,947 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:12:12,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:12:12,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:12:12,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:12:12,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:12,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:12,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,060 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-20 21:12:13,060 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 [2022-11-20 21:12:13,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,086 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 [2022-11-20 21:12:13,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,110 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 [2022-11-20 21:12:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,174 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 [2022-11-20 21:12:13,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:12:13,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:12:13,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:12:13,450 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-20 21:12:13,450 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 [2022-11-20 21:12:13,574 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 [2022-11-20 21:12:13,624 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 21:12:13,624 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 [2022-11-20 21:12:13,696 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-20 21:12:13,696 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 [2022-11-20 21:12:13,786 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 21:12:13,787 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 [2022-11-20 21:12:13,878 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-20 21:12:13,879 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 [2022-11-20 21:12:13,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:12:14,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '348#(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 [2022-11-20 21:12:14,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:12:14,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:12:14,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 21:12:14,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465009157] [2022-11-20 21:12:14,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:12:14,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:12:14,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:12:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:12:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:12:14,358 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) [2022-11-20 21:12:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:12:14,470 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-20 21:12:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:12:14,470 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 [2022-11-20 21:12:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:12:14,471 INFO L225 Difference]: With dead ends: 14 [2022-11-20 21:12:14,471 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 21:12:14,471 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 [2022-11-20 21:12:14,472 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:12:14,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:12:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 21:12:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-20 21:12:14,475 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) [2022-11-20 21:12:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-20 21:12:14,476 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2022-11-20 21:12:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:12:14,476 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-20 21:12:14,476 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) [2022-11-20 21:12:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-20 21:12:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:12:14,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:12:14,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 21:12:14,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:12:14,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:12:14,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:12:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:12:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2022-11-20 21:12:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:12:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284088709] [2022-11-20 21:12:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:12:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:12:14,705 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:12:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562957508] [2022-11-20 21:12:14,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:12:14,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:12:14,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:12:14,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:12:14,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:12:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 21:12:14,798 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 21:12:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 21:12:14,844 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 21:12:14,844 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 21:12:14,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 21:12:14,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:12:15,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 21:12:15,055 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-20 21:12:15,059 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 21:12:15,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:12:15 BoogieIcfgContainer [2022-11-20 21:12:15,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 21:12:15,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 21:12:15,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 21:12:15,090 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 21:12:15,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:12:07" (3/4) ... [2022-11-20 21:12:15,092 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 21:12:15,132 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80dfe229-84f9-4c50-b970-6ddebfe11779/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 21:12:15,133 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 21:12:15,133 INFO L158 Benchmark]: Toolchain (without parser) took 9020.00ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 111.9MB in the beginning and 176.4MB in the end (delta: -64.5MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2022-11-20 21:12:15,134 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 109.1MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:12:15,134 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.25ms. Allocated memory is still 153.1MB. Free memory was 111.9MB in the beginning and 124.1MB in the end (delta: -12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 21:12:15,134 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.64ms. Allocated memory is still 153.1MB. Free memory was 124.1MB in the beginning and 122.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:12:15,134 INFO L158 Benchmark]: Boogie Preprocessor took 47.46ms. Allocated memory is still 153.1MB. Free memory was 122.5MB in the beginning and 121.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:12:15,135 INFO L158 Benchmark]: RCFGBuilder took 455.79ms. Allocated memory is still 153.1MB. Free memory was 121.5MB in the beginning and 106.3MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-20 21:12:15,135 INFO L158 Benchmark]: TraceAbstraction took 8028.49ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 105.8MB in the beginning and 178.5MB in the end (delta: -72.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:12:15,135 INFO L158 Benchmark]: Witness Printer took 43.49ms. Allocated memory is still 222.3MB. Free memory was 178.5MB in the beginning and 176.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:12:15,137 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 109.1MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 372.25ms. Allocated memory is still 153.1MB. Free memory was 111.9MB in the beginning and 124.1MB in the end (delta: -12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.64ms. Allocated memory is still 153.1MB. Free memory was 124.1MB in the beginning and 122.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 47.46ms. Allocated memory is still 153.1MB. Free memory was 122.5MB in the beginning and 121.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 455.79ms. Allocated memory is still 153.1MB. Free memory was 121.5MB in the beginning and 106.3MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8028.49ms. Allocated memory was 153.1MB in the beginning and 222.3MB in the end (delta: 69.2MB). Free memory was 105.8MB in the beginning and 178.5MB in the end (delta: -72.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 43.49ms. Allocated memory is still 222.3MB. Free memory was 178.5MB in the beginning and 176.4MB 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