./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:05:12,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:05:12,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:05:12,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:05:12,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:05:12,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:05:12,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:05:12,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:05:12,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:05:12,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:05:12,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:05:12,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:05:12,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:05:12,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:05:12,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:05:12,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:05:12,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:05:12,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:05:12,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:05:12,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:05:12,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:05:12,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:05:12,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:05:12,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:05:12,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:05:12,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:05:12,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:05:12,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:05:12,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:05:12,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:05:12,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:05:12,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:05:12,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:05:12,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:05:12,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:05:12,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:05:12,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:05:12,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:05:12,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:05:12,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:05:12,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:05:12,283 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:05:12,326 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:05:12,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:05:12,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:05:12,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:05:12,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:05:12,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:05:12,329 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:05:12,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:05:12,329 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:05:12,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:05:12,331 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:05:12,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:05:12,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:05:12,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:05:12,332 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:05:12,332 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:05:12,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:05:12,332 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:05:12,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:05:12,333 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:05:12,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:05:12,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:05:12,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:05:12,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:05:12,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:05:12,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:05:12,335 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:05:12,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:05:12,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:05:12,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:05:12,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:05:12,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:05:12,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:12,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:05:12,337 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:05:12,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:05:12,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:05:12,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:05:12,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:05:12,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:05:12,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:05:12,338 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_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2022-11-26 00:05:12,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:05:12,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:05:12,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:05:12,667 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:05:12,668 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:05:12,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2022-11-26 00:05:15,807 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:05:16,045 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:05:16,046 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/sv-benchmarks/c/array-patterns/array4_pattern.c [2022-11-26 00:05:16,052 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/data/5cec9459c/2d8a6002966a4419bf86ff507c8b0c4c/FLAG0ff561417 [2022-11-26 00:05:16,071 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/data/5cec9459c/2d8a6002966a4419bf86ff507c8b0c4c [2022-11-26 00:05:16,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:05:16,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:05:16,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:16,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:05:16,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:05:16,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a7f060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16, skipping insertion in model container [2022-11-26 00:05:16,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:05:16,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:05:16,322 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_15bcc159-6f23-42a0-a5d4-03fe106ac29a/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-11-26 00:05:16,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:16,368 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:05:16,403 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_15bcc159-6f23-42a0-a5d4-03fe106ac29a/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-11-26 00:05:16,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:16,448 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:05:16,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16 WrapperNode [2022-11-26 00:05:16,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:16,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:16,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:05:16,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:05:16,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,509 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2022-11-26 00:05:16,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:16,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:05:16,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:05:16,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:05:16,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,552 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:05:16,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:05:16,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:05:16,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:05:16,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (1/1) ... [2022-11-26 00:05:16,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:16,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:16,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:05:16,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:05:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:05:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:05:16,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:05:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:05:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:05:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:05:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:05:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:05:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:05:16,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:05:16,722 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:05:16,724 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:05:16,915 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:05:16,960 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:05:16,965 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:05:16,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:16 BoogieIcfgContainer [2022-11-26 00:05:16,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:05:16,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:05:16,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:05:16,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:05:16,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:16" (1/3) ... [2022-11-26 00:05:16,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ef637f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:16, skipping insertion in model container [2022-11-26 00:05:16,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:16" (2/3) ... [2022-11-26 00:05:16,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ef637f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:16, skipping insertion in model container [2022-11-26 00:05:16,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:16" (3/3) ... [2022-11-26 00:05:16,978 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2022-11-26 00:05:16,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:05:16,998 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:05:17,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:05:17,050 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;@3cab8c53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:05:17,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:05:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:05:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:05:17,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:17,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:17,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1119781689, now seen corresponding path program 1 times [2022-11-26 00:05:17,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:17,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318311311] [2022-11-26 00:05:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:17,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:17,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:17,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318311311] [2022-11-26 00:05:17,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318311311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:17,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:17,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:05:17,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285240552] [2022-11-26 00:05:17,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:17,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:05:17,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:17,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:05:17,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:05:17,335 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:05:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:17,413 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-11-26 00:05:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:05:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-26 00:05:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:17,422 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:05:17,422 INFO L226 Difference]: Without dead ends: 20 [2022-11-26 00:05:17,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:05:17,428 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:17,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:05:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-26 00:05:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-26 00:05:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:05:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-26 00:05:17,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2022-11-26 00:05:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:17,466 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-26 00:05:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:05:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-26 00:05:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:05:17,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:17,468 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:17,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:05:17,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:17,469 INFO L85 PathProgramCache]: Analyzing trace with hash -166120417, now seen corresponding path program 1 times [2022-11-26 00:05:17,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:17,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447124026] [2022-11-26 00:05:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:17,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:17,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:17,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022458048] [2022-11-26 00:05:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:17,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:17,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:17,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:17,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:05:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:17,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:05:17,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:05:17,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:17,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:17,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447124026] [2022-11-26 00:05:17,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:05:17,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022458048] [2022-11-26 00:05:17,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022458048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:17,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:17,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:05:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294807671] [2022-11-26 00:05:17,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:05:17,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:05:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:05:17,761 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:05:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:17,799 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-26 00:05:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:05:17,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2022-11-26 00:05:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:17,801 INFO L225 Difference]: With dead ends: 24 [2022-11-26 00:05:17,801 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 00:05:17,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:05:17,803 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:17,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:05:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 00:05:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-26 00:05:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:05:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-26 00:05:17,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 27 [2022-11-26 00:05:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:17,811 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-26 00:05:17,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:05:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-26 00:05:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:05:17,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:17,813 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:17,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:18,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:18,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash -855080832, now seen corresponding path program 1 times [2022-11-26 00:05:18,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:18,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753259401] [2022-11-26 00:05:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:18,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:18,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533684949] [2022-11-26 00:05:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:18,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:18,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:18,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:18,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:05:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:05:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:05:18,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:18,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753259401] [2022-11-26 00:05:18,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:05:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533684949] [2022-11-26 00:05:18,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533684949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:18,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:18,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:05:18,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975324972] [2022-11-26 00:05:18,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:18,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:05:18,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:05:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:05:18,323 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:05:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:18,419 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-11-26 00:05:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:05:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-11-26 00:05:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:18,421 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:05:18,421 INFO L226 Difference]: Without dead ends: 22 [2022-11-26 00:05:18,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:18,423 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:18,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 67 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:05:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-26 00:05:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-26 00:05:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:05:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-26 00:05:18,430 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2022-11-26 00:05:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:18,431 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-26 00:05:18,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:05:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-26 00:05:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:05:18,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:18,433 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:18,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:18,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:18,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash -70074783, now seen corresponding path program 1 times [2022-11-26 00:05:18,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833527200] [2022-11-26 00:05:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:18,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:18,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377099879] [2022-11-26 00:05:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:18,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:18,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:18,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:18,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:05:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-26 00:05:18,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:18,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:05:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:19,018 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 14 treesize of output 14 [2022-11-26 00:05:19,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 00:05:19,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:19,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 28 [2022-11-26 00:05:20,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:20,138 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-26 00:05:20,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 17 [2022-11-26 00:05:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:05:20,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:32,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833527200] [2022-11-26 00:05:32,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:05:32,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377099879] [2022-11-26 00:05:32,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377099879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1065209715] [2022-11-26 00:05:32,462 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:05:32,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:05:32,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:05:32,472 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:05:32,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:05:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:32,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:32,681 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-26 00:05:32,682 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 33 treesize of output 57 [2022-11-26 00:05:32,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:32,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:32,834 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:05:32,835 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:05:32,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:32,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:32,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:05:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:33,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:33,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:33,111 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:05:33,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-26 00:05:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:33,230 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:05:33,232 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:05:33,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:33,573 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:05:33,574 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:05:33,739 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:05:33,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:05:36,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '553#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:05:36,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:05:36,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:05:36,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-26 00:05:36,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566558543] [2022-11-26 00:05:36,106 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:36,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:05:36,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:36,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:05:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1216, Unknown=5, NotChecked=0, Total=1406 [2022-11-26 00:05:36,109 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-26 00:05:38,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:05:40,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:05:43,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:05:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:43,089 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-11-26 00:05:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:05:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-11-26 00:05:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:43,091 INFO L225 Difference]: With dead ends: 66 [2022-11-26 00:05:43,091 INFO L226 Difference]: Without dead ends: 63 [2022-11-26 00:05:43,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=280, Invalid=1971, Unknown=5, NotChecked=0, Total=2256 [2022-11-26 00:05:43,093 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 56 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:43,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 84 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 327 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-11-26 00:05:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-26 00:05:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-11-26 00:05:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 00:05:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-26 00:05:43,121 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 29 [2022-11-26 00:05:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:43,121 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-26 00:05:43,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-26 00:05:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-26 00:05:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:05:43,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:43,124 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:43,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:43,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:43,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1504691040, now seen corresponding path program 2 times [2022-11-26 00:05:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:43,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497504093] [2022-11-26 00:05:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:43,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:43,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:43,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157527939] [2022-11-26 00:05:43,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:05:43,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:43,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:43,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:43,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:05:43,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:05:43,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:43,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:05:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:05:43,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:05:43,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497504093] [2022-11-26 00:05:43,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:05:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157527939] [2022-11-26 00:05:43,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157527939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311773776] [2022-11-26 00:05:43,702 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:05:43,702 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:05:43,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:05:43,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:05:43,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:05:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:43,829 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:05:43,830 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:05:43,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:43,856 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 33 treesize of output 43 [2022-11-26 00:05:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:43,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:43,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:05:44,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:44,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:44,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:44,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:44,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:44,135 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:05:44,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-26 00:05:44,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:44,401 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:05:44,401 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:05:44,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:44,656 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:05:44,656 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:05:44,786 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:05:44,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:05:46,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:05:46,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:05:46,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:05:46,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-26 00:05:46,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934155910] [2022-11-26 00:05:46,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:46,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:05:46,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:05:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:05:46,598 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:05:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:46,841 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-11-26 00:05:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:05:46,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2022-11-26 00:05:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:46,844 INFO L225 Difference]: With dead ends: 74 [2022-11-26 00:05:46,844 INFO L226 Difference]: Without dead ends: 71 [2022-11-26 00:05:46,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:05:46,845 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:46,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 117 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-26 00:05:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2022-11-26 00:05:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-26 00:05:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-11-26 00:05:46,864 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 30 [2022-11-26 00:05:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:46,864 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-11-26 00:05:46,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:05:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-11-26 00:05:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:05:46,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:46,866 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:46,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:47,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:47,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2122333822, now seen corresponding path program 3 times [2022-11-26 00:05:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:47,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314336923] [2022-11-26 00:05:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:47,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:47,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:47,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139674469] [2022-11-26 00:05:47,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:05:47,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:47,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:47,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:47,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:05:47,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:05:47,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:05:47,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:05:47,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:05:47,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314336923] [2022-11-26 00:05:47,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:05:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139674469] [2022-11-26 00:05:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139674469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640206875] [2022-11-26 00:05:47,409 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:05:47,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:05:47,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:05:47,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:05:47,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:05:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,527 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:05:47,528 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:05:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,555 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 33 treesize of output 43 [2022-11-26 00:05:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:05:47,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:47,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:47,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:47,747 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:05:47,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-26 00:05:47,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:47,843 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:05:47,843 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:05:48,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:48,126 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:05:48,126 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:05:48,270 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:05:48,271 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:05:50,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1365#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:05:50,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:05:50,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:05:50,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-26 00:05:50,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692355075] [2022-11-26 00:05:50,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:50,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:05:50,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:05:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:05:50,031 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:05:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:50,203 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-26 00:05:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:05:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2022-11-26 00:05:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:50,204 INFO L225 Difference]: With dead ends: 75 [2022-11-26 00:05:50,205 INFO L226 Difference]: Without dead ends: 68 [2022-11-26 00:05:50,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:05:50,206 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:50,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 94 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:05:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-26 00:05:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-11-26 00:05:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-26 00:05:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-26 00:05:50,223 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 30 [2022-11-26 00:05:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:50,223 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-26 00:05:50,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:05:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-26 00:05:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:05:50,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:50,225 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:50,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:50,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:05:50,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash 598902815, now seen corresponding path program 4 times [2022-11-26 00:05:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:50,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179150957] [2022-11-26 00:05:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:50,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:50,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699756108] [2022-11-26 00:05:50,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:05:50,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:50,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:50,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:50,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:05:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-26 00:05:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:50,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:05:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:50,669 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-26 00:05:50,674 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 20 treesize of output 20 [2022-11-26 00:05:50,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 00:05:50,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 00:05:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:50,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-26 00:05:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:51,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:51,929 INFO L321 Elim1Store]: treesize reduction 64, result has 47.1 percent of original size [2022-11-26 00:05:51,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 93 [2022-11-26 00:05:52,313 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-26 00:05:52,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2022-11-26 00:05:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:05:52,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:52,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:52,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179150957] [2022-11-26 00:05:52,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:05:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699756108] [2022-11-26 00:05:52,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699756108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1944167332] [2022-11-26 00:05:52,811 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:05:52,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:05:52,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:05:52,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:05:52,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:05:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:52,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:52,947 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:05:52,948 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:05:52,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:52,968 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 33 treesize of output 43 [2022-11-26 00:05:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:52,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:05:53,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:53,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:53,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:53,221 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:05:53,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-26 00:05:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:05:53,390 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:05:53,390 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:05:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:54,213 INFO L321 Elim1Store]: treesize reduction 53, result has 39.1 percent of original size [2022-11-26 00:05:54,214 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 3 case distinctions, treesize of input 224 treesize of output 186 [2022-11-26 00:05:54,621 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:05:54,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:05:58,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1766#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:05:58,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:05:58,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:05:58,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-26 00:05:58,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282061234] [2022-11-26 00:05:58,034 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:58,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:05:58,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:05:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:05:58,037 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-26 00:05:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:59,512 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2022-11-26 00:05:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:05:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2022-11-26 00:05:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:59,514 INFO L225 Difference]: With dead ends: 92 [2022-11-26 00:05:59,514 INFO L226 Difference]: Without dead ends: 89 [2022-11-26 00:05:59,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:05:59,515 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:59,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 145 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:05:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-26 00:05:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2022-11-26 00:05:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 49 states have internal predecessors, (55), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-26 00:05:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2022-11-26 00:05:59,539 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 31 [2022-11-26 00:05:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:59,539 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2022-11-26 00:05:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-26 00:05:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2022-11-26 00:05:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:05:59,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:59,541 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:59,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 00:05:59,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:59,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 617181854, now seen corresponding path program 5 times [2022-11-26 00:05:59,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:59,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117183563] [2022-11-26 00:05:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:59,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:59,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:05:59,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469963900] [2022-11-26 00:05:59,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:05:59,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:59,815 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:59,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:05:59,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:05:59,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:59,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:05:59,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:06:00,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:06:00,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117183563] [2022-11-26 00:06:00,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469963900] [2022-11-26 00:06:00,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469963900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759174290] [2022-11-26 00:06:00,138 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:00,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:00,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:00,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:00,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,263 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:00,264 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,282 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 33 treesize of output 43 [2022-11-26 00:06:00,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:06:00,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:00,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:00,498 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:06:00,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-26 00:06:00,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:00,694 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:00,694 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:00,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:00,913 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:00,914 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:01,032 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:01,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:02,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2267#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:02,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:02,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:06:02,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-26 00:06:02,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247042450] [2022-11-26 00:06:02,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:02,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:06:02,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:06:02,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:06:02,755 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:03,079 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2022-11-26 00:06:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:06:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2022-11-26 00:06:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:03,081 INFO L225 Difference]: With dead ends: 128 [2022-11-26 00:06:03,082 INFO L226 Difference]: Without dead ends: 125 [2022-11-26 00:06:03,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:06:03,083 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 57 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:03,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 121 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:06:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-26 00:06:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2022-11-26 00:06:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-26 00:06:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-11-26 00:06:03,121 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 32 [2022-11-26 00:06:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:03,122 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-11-26 00:06:03,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-11-26 00:06:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:06:03,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:03,124 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:03,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:03,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:03,334 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1385802880, now seen corresponding path program 6 times [2022-11-26 00:06:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:03,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39566751] [2022-11-26 00:06:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:03,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:03,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:03,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230759497] [2022-11-26 00:06:03,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:06:03,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:03,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:03,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:06:03,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:06:03,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:03,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:06:03,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:06:03,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:06:03,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:03,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39566751] [2022-11-26 00:06:03,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:03,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230759497] [2022-11-26 00:06:03,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230759497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:03,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [693395345] [2022-11-26 00:06:03,649 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:03,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:03,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:03,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:03,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:03,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,771 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:03,772 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,791 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 33 treesize of output 43 [2022-11-26 00:06:03,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:06:03,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:03,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:03,962 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:06:03,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-26 00:06:04,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:04,047 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:04,047 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:04,310 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:04,310 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:04,435 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:04,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:06,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2830#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:06,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:06,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:06:06,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-26 00:06:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506392085] [2022-11-26 00:06:06,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:06,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:06:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:06:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:06:06,210 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:06,554 INFO L93 Difference]: Finished difference Result 155 states and 199 transitions. [2022-11-26 00:06:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:06:06,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2022-11-26 00:06:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:06,556 INFO L225 Difference]: With dead ends: 155 [2022-11-26 00:06:06,556 INFO L226 Difference]: Without dead ends: 147 [2022-11-26 00:06:06,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:06:06,558 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 102 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:06,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 133 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:06:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-26 00:06:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 92. [2022-11-26 00:06:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.125) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-26 00:06:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2022-11-26 00:06:06,588 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 32 [2022-11-26 00:06:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:06,588 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2022-11-26 00:06:06,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2022-11-26 00:06:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:06:06,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:06,590 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:06,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:06,796 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1952453089, now seen corresponding path program 7 times [2022-11-26 00:06:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:06,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670621736] [2022-11-26 00:06:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:06,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:06,816 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:06,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169852046] [2022-11-26 00:06:06,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:06:06,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:06,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:06,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:06,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:06:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:06,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-26 00:06:06,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:06,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:06:07,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:07,037 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-26 00:06:07,042 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 20 treesize of output 20 [2022-11-26 00:06:07,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 00:06:07,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 00:06:07,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:07,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:07,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:06:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:07,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-11-26 00:06:08,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:08,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:08,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:08,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:08,724 INFO L321 Elim1Store]: treesize reduction 98, result has 47.0 percent of original size [2022-11-26 00:06:08,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 129 [2022-11-26 00:06:09,528 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:06:09,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2022-11-26 00:06:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:06:09,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:10,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670621736] [2022-11-26 00:06:10,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169852046] [2022-11-26 00:06:10,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169852046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269623606] [2022-11-26 00:06:10,765 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:10,765 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:10,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:10,766 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:10,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:10,868 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-26 00:06:10,869 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 33 treesize of output 57 [2022-11-26 00:06:10,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:10,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:10,963 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:10,964 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:10,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:10,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:10,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:06:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:11,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:11,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:11,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:11,155 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:06:11,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-26 00:06:11,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:11,471 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:11,471 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:11,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:11,675 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:11,675 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:11,799 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:11,801 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:14,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3419#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:14,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:14,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:14,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-26 00:06:14,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590579698] [2022-11-26 00:06:14,495 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:14,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:06:14,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:06:14,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:06:14,498 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:06:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:16,565 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2022-11-26 00:06:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:06:16,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2022-11-26 00:06:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:16,567 INFO L225 Difference]: With dead ends: 123 [2022-11-26 00:06:16,567 INFO L226 Difference]: Without dead ends: 120 [2022-11-26 00:06:16,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=376, Invalid=3284, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:06:16,569 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:16,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 123 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:06:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-26 00:06:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2022-11-26 00:06:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 66 states have internal predecessors, (74), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-26 00:06:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2022-11-26 00:06:16,617 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 33 [2022-11-26 00:06:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:16,617 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2022-11-26 00:06:16,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:06:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2022-11-26 00:06:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:06:16,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:16,619 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:16,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:16,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:06:16,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1956226912, now seen corresponding path program 8 times [2022-11-26 00:06:16,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:16,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983533926] [2022-11-26 00:06:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:16,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:16,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:16,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740450211] [2022-11-26 00:06:16,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:06:16,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:16,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:16,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:16,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:06:17,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:06:17,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:17,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:06:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:06:17,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:06:17,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983533926] [2022-11-26 00:06:17,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740450211] [2022-11-26 00:06:17,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740450211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:17,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [123188833] [2022-11-26 00:06:17,231 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:17,231 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:17,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:17,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:17,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:17,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,343 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:17,344 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:17,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,375 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 33 treesize of output 43 [2022-11-26 00:06:17,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:06:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:17,525 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:06:17,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-26 00:06:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:17,603 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:17,604 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:17,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:17,804 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:17,804 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:17,918 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:17,920 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:19,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4033#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:19,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:19,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:06:19,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-26 00:06:19,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305981459] [2022-11-26 00:06:19,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:19,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:06:19,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:06:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:06:19,571 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:20,022 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2022-11-26 00:06:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:06:20,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2022-11-26 00:06:20,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:20,024 INFO L225 Difference]: With dead ends: 173 [2022-11-26 00:06:20,024 INFO L226 Difference]: Without dead ends: 170 [2022-11-26 00:06:20,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:06:20,026 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 79 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:20,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 210 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:20,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-26 00:06:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 119. [2022-11-26 00:06:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 73 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-26 00:06:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2022-11-26 00:06:20,064 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 34 [2022-11-26 00:06:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:20,064 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2022-11-26 00:06:20,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2022-11-26 00:06:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:06:20,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:20,066 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:20,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:20,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:20,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:20,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash 396188414, now seen corresponding path program 9 times [2022-11-26 00:06:20,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:20,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440437993] [2022-11-26 00:06:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:20,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:20,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:20,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379257302] [2022-11-26 00:06:20,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:06:20,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:20,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:20,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:06:20,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:06:20,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:20,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:06:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:06:20,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:06:20,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:20,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440437993] [2022-11-26 00:06:20,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:20,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379257302] [2022-11-26 00:06:20,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379257302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:20,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413098404] [2022-11-26 00:06:20,662 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:20,662 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:20,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:20,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:20,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:20,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,779 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:20,779 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:20,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,794 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 33 treesize of output 43 [2022-11-26 00:06:20,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:06:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:20,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:20,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:20,940 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:06:20,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-26 00:06:21,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:21,038 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:21,039 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:21,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:21,244 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:21,244 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:21,351 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:21,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:23,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4727#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:23,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:23,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:06:23,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-26 00:06:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283564662] [2022-11-26 00:06:23,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:23,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:06:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:06:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:06:23,079 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:23,608 INFO L93 Difference]: Finished difference Result 248 states and 327 transitions. [2022-11-26 00:06:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:06:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2022-11-26 00:06:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:23,612 INFO L225 Difference]: With dead ends: 248 [2022-11-26 00:06:23,612 INFO L226 Difference]: Without dead ends: 239 [2022-11-26 00:06:23,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:06:23,613 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 144 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:23,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 214 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-26 00:06:23,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 120. [2022-11-26 00:06:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 74 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-26 00:06:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2022-11-26 00:06:23,670 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 34 [2022-11-26 00:06:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:23,670 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2022-11-26 00:06:23,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2022-11-26 00:06:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:06:23,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:23,672 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:23,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:23,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:06:23,878 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:23,878 INFO L85 PathProgramCache]: Analyzing trace with hash -513807329, now seen corresponding path program 10 times [2022-11-26 00:06:23,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:23,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657627936] [2022-11-26 00:06:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:23,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:23,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:23,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091698064] [2022-11-26 00:06:23,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:06:23,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:23,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:23,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:23,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:06:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:24,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-26 00:06:24,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:24,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:06:24,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:24,164 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-11-26 00:06:24,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 12 [2022-11-26 00:06:24,175 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 29 treesize of output 28 [2022-11-26 00:06:24,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2022-11-26 00:06:24,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-11-26 00:06:24,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:24,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:24,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2022-11-26 00:06:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:26,195 INFO L321 Elim1Store]: treesize reduction 132, result has 47.0 percent of original size [2022-11-26 00:06:26,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 165 [2022-11-26 00:06:27,838 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-26 00:06:27,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2022-11-26 00:06:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:06:27,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:30,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:30,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657627936] [2022-11-26 00:06:30,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091698064] [2022-11-26 00:06:30,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091698064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966830917] [2022-11-26 00:06:30,258 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:30,258 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:30,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:30,258 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:30,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:30,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,376 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:30,376 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,401 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 33 treesize of output 43 [2022-11-26 00:06:30,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:06:30,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:30,593 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:06:30,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-26 00:06:30,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:30,673 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:30,673 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:30,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,884 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:30,885 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:30,996 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:30,998 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:34,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5525#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:34,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:34,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:34,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-26 00:06:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823828977] [2022-11-26 00:06:34,380 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:06:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:34,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:06:34,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:06:34,382 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:06:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:37,817 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2022-11-26 00:06:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:06:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-11-26 00:06:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:37,818 INFO L225 Difference]: With dead ends: 153 [2022-11-26 00:06:37,819 INFO L226 Difference]: Without dead ends: 150 [2022-11-26 00:06:37,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=469, Invalid=4361, Unknown=0, NotChecked=0, Total=4830 [2022-11-26 00:06:37,821 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:37,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 145 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:06:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-26 00:06:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 134. [2022-11-26 00:06:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 83 states have internal predecessors, (93), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-26 00:06:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2022-11-26 00:06:37,872 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 35 [2022-11-26 00:06:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:37,872 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2022-11-26 00:06:37,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:06:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2022-11-26 00:06:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:06:37,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:37,873 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:37,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:38,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:06:38,085 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1341095710, now seen corresponding path program 11 times [2022-11-26 00:06:38,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:38,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509459907] [2022-11-26 00:06:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:38,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:38,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:38,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313018376] [2022-11-26 00:06:38,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:06:38,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:38,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:38,128 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:38,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:06:38,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:06:38,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:06:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:06:38,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:06:38,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:38,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509459907] [2022-11-26 00:06:38,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:38,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313018376] [2022-11-26 00:06:38,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313018376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:38,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588645096] [2022-11-26 00:06:38,549 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:38,550 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:38,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:38,550 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:38,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:38,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,655 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-26 00:06:38,655 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 33 treesize of output 57 [2022-11-26 00:06:38,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,769 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:38,770 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:38,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:06:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:38,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:38,930 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:06:38,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-26 00:06:38,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:39,007 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:39,007 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:39,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:39,191 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:39,192 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:39,299 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:39,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:41,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6250#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:41,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:41,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:06:41,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-26 00:06:41,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220624457] [2022-11-26 00:06:41,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:41,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:06:41,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:06:41,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:06:41,010 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:41,526 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2022-11-26 00:06:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:06:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2022-11-26 00:06:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:41,528 INFO L225 Difference]: With dead ends: 219 [2022-11-26 00:06:41,528 INFO L226 Difference]: Without dead ends: 216 [2022-11-26 00:06:41,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:06:41,530 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 92 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:41,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 264 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-26 00:06:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 147. [2022-11-26 00:06:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 90 states have internal predecessors, (101), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-26 00:06:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 183 transitions. [2022-11-26 00:06:41,572 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 183 transitions. Word has length 36 [2022-11-26 00:06:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:41,572 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 183 transitions. [2022-11-26 00:06:41,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 183 transitions. [2022-11-26 00:06:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:06:41,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:41,574 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:41,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:41,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:41,780 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1251526784, now seen corresponding path program 12 times [2022-11-26 00:06:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:41,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666252326] [2022-11-26 00:06:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:41,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:41,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:41,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108365757] [2022-11-26 00:06:41,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:06:41,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:41,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:41,799 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:41,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:06:41,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:06:41,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:41,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:06:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:06:42,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:06:42,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666252326] [2022-11-26 00:06:42,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108365757] [2022-11-26 00:06:42,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108365757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1661572658] [2022-11-26 00:06:42,228 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:42,228 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:42,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:42,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:42,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,340 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:42,341 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,355 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 33 treesize of output 43 [2022-11-26 00:06:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:06:42,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:42,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:42,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:42,568 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:06:42,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-26 00:06:42,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:42,753 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:42,753 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:42,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:42,948 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:42,948 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:43,052 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:43,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:44,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7077#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:44,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:44,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:06:44,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-26 00:06:44,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854127242] [2022-11-26 00:06:44,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:44,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:06:44,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:06:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:06:44,839 INFO L87 Difference]: Start difference. First operand 147 states and 183 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:45,834 INFO L93 Difference]: Finished difference Result 371 states and 495 transitions. [2022-11-26 00:06:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:06:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2022-11-26 00:06:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:45,840 INFO L225 Difference]: With dead ends: 371 [2022-11-26 00:06:45,840 INFO L226 Difference]: Without dead ends: 361 [2022-11-26 00:06:45,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:06:45,845 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 415 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:45,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 288 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:06:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-26 00:06:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 148. [2022-11-26 00:06:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 91 states have internal predecessors, (101), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-26 00:06:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2022-11-26 00:06:45,917 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 36 [2022-11-26 00:06:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:45,918 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2022-11-26 00:06:45,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:06:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2022-11-26 00:06:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:06:45,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:45,919 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:45,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:46,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:06:46,126 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:46,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1376021151, now seen corresponding path program 13 times [2022-11-26 00:06:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:46,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001464680] [2022-11-26 00:06:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:46,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:46,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:06:46,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962746549] [2022-11-26 00:06:46,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:06:46,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:46,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:46,156 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:46,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:06:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:46,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-26 00:06:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:46,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:06:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,505 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-11-26 00:06:46,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 12 [2022-11-26 00:06:46,515 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 29 treesize of output 28 [2022-11-26 00:06:46,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2022-11-26 00:06:46,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-11-26 00:06:46,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 115 [2022-11-26 00:06:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2022-11-26 00:06:48,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:49,063 INFO L321 Elim1Store]: treesize reduction 166, result has 47.0 percent of original size [2022-11-26 00:06:49,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 201 [2022-11-26 00:06:51,806 INFO L321 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-11-26 00:06:51,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2022-11-26 00:06:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:06:51,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:55,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001464680] [2022-11-26 00:06:55,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:06:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962746549] [2022-11-26 00:06:55,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962746549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639242946] [2022-11-26 00:06:55,946 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:06:55,946 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:55,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:55,947 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:55,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:55,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:55,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,056 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:06:56,056 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:06:56,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:06:56,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:06:56,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:56,224 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:06:56,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-26 00:06:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:56,303 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:06:56,304 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:06:56,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:56,495 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:06:56,495 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:06:56,590 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:06:56,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:00,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8134#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:07:00,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:07:00,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:07:00,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-26 00:07:00,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299725368] [2022-11-26 00:07:00,124 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:00,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:07:00,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:07:00,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3113, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:07:00,127 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:07:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:05,124 INFO L93 Difference]: Finished difference Result 183 states and 227 transitions. [2022-11-26 00:07:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-26 00:07:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2022-11-26 00:07:05,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:05,127 INFO L225 Difference]: With dead ends: 183 [2022-11-26 00:07:05,127 INFO L226 Difference]: Without dead ends: 180 [2022-11-26 00:07:05,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=492, Invalid=4910, Unknown=0, NotChecked=0, Total=5402 [2022-11-26 00:07:05,129 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:05,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 158 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:07:05,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-26 00:07:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2022-11-26 00:07:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 100 states have internal predecessors, (112), 45 states have call successors, (45), 17 states have call predecessors, (45), 17 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-26 00:07:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-11-26 00:07:05,207 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 37 [2022-11-26 00:07:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:05,208 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-11-26 00:07:05,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:07:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-11-26 00:07:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:07:05,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:05,209 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:05,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:05,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:07:05,416 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:07:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1225628512, now seen corresponding path program 14 times [2022-11-26 00:07:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:05,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296204235] [2022-11-26 00:07:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:05,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:07:05,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045850681] [2022-11-26 00:07:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:07:05,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:05,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:05,437 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:05,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:07:05,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:07:05,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:07:05,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:07:05,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:07:05,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:07:05,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:05,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296204235] [2022-11-26 00:07:05,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:07:05,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045850681] [2022-11-26 00:07:05,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045850681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:05,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061849744] [2022-11-26 00:07:05,967 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:07:05,967 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:07:05,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:07:05,967 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:07:05,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:07:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,067 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:07:06,067 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:07:06,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,082 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 33 treesize of output 43 [2022-11-26 00:07:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:07:06,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:06,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:06,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:06,254 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:07:06,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-26 00:07:06,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:06,416 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:07:06,417 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:07:06,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:06,613 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:07:06,613 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:07:06,707 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:07:06,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:08,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8968#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:07:08,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:07:08,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:07:08,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-26 00:07:08,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209843337] [2022-11-26 00:07:08,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:08,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:07:08,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:08,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:07:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:07:08,414 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:07:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:09,081 INFO L93 Difference]: Finished difference Result 266 states and 330 transitions. [2022-11-26 00:07:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:07:09,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2022-11-26 00:07:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:09,083 INFO L225 Difference]: With dead ends: 266 [2022-11-26 00:07:09,083 INFO L226 Difference]: Without dead ends: 263 [2022-11-26 00:07:09,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:07:09,084 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:09,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 335 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:07:09,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-26 00:07:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 175. [2022-11-26 00:07:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 107 states have internal predecessors, (120), 49 states have call successors, (49), 19 states have call predecessors, (49), 19 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-26 00:07:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2022-11-26 00:07:09,169 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 38 [2022-11-26 00:07:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:09,169 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2022-11-26 00:07:09,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:07:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2022-11-26 00:07:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:07:09,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:09,170 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:09,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:09,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:07:09,382 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:07:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:09,382 INFO L85 PathProgramCache]: Analyzing trace with hash 292702078, now seen corresponding path program 15 times [2022-11-26 00:07:09,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:09,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964889164] [2022-11-26 00:07:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:09,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:09,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:07:09,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252599219] [2022-11-26 00:07:09,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:07:09,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:09,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:09,401 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:09,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:07:09,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:07:09,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:07:09,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:07:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:07:09,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:07:09,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964889164] [2022-11-26 00:07:09,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:07:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252599219] [2022-11-26 00:07:09,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252599219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [12004602] [2022-11-26 00:07:09,930 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 00:07:09,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:07:09,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:07:09,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:07:09,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:07:09,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:09,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,045 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:07:10,046 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 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:07:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,061 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 33 treesize of output 43 [2022-11-26 00:07:10,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:07:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:10,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:10,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:10,257 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:07:10,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-26 00:07:10,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:10,447 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:07:10,447 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-26 00:07:10,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,630 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-26 00:07:10,630 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-26 00:07:10,723 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-26 00:07:10,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:12,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9930#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:07:12,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:07:12,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:07:12,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-26 00:07:12,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684790084] [2022-11-26 00:07:12,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:12,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:07:12,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:07:12,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:07:12,577 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:07:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:14,108 INFO L93 Difference]: Finished difference Result 520 states and 699 transitions. [2022-11-26 00:07:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:07:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2022-11-26 00:07:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:14,111 INFO L225 Difference]: With dead ends: 520 [2022-11-26 00:07:14,111 INFO L226 Difference]: Without dead ends: 509 [2022-11-26 00:07:14,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:07:14,113 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 437 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:14,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 393 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:07:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-11-26 00:07:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 176. [2022-11-26 00:07:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 108 states have internal predecessors, (120), 49 states have call successors, (49), 19 states have call predecessors, (49), 19 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-26 00:07:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 218 transitions. [2022-11-26 00:07:14,196 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 218 transitions. Word has length 38 [2022-11-26 00:07:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:14,197 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 218 transitions. [2022-11-26 00:07:14,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 00:07:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 218 transitions. [2022-11-26 00:07:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:07:14,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:14,198 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:14,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:14,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:07:14,404 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:07:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:14,405 INFO L85 PathProgramCache]: Analyzing trace with hash 659906591, now seen corresponding path program 16 times [2022-11-26 00:07:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280834027] [2022-11-26 00:07:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:14,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:07:14,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34780571] [2022-11-26 00:07:14,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:07:14,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:14,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:14,425 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:14,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bcc159-6f23-42a0-a5d4-03fe106ac29a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:07:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:14,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 159 conjunts are in the unsatisfiable core [2022-11-26 00:07:14,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:14,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:07:14,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:14,888 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-26 00:07:14,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-26 00:07:14,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:07:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:14,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:07:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-11-26 00:07:15,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 93 [2022-11-26 00:07:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 123 [2022-11-26 00:07:15,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:15,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 135 [2022-11-26 00:07:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,859 INFO L321 Elim1Store]: treesize reduction 200, result has 46.9 percent of original size [2022-11-26 00:07:17,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 237 [2022-11-26 00:07:22,140 INFO L321 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2022-11-26 00:07:22,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 470 treesize of output 218 [2022-11-26 00:07:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:07:22,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:35,510 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 34 DAG size of output: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:07:48,655 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:08:40,816 WARN L233 SmtUtils]: Spent 29.73s on a formula simplification. DAG size of input: 28 DAG size of output: 25 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-26 00:08:40,817 INFO L321 Elim1Store]: treesize reduction 17, result has 66.0 percent of original size [2022-11-26 00:08:40,817 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 2764842 treesize of output 1766474 [2022-11-26 00:08:43,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:43,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 918565 treesize of output 649775