./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bec73cbd355af8995620266d1bb50e13212a1740ed8bd583620b6985b8fd569c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:04:00,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:04:00,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:04:00,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:04:00,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:04:00,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:04:00,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:04:00,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:04:00,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:04:00,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:04:00,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:04:00,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:04:00,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:04:00,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:04:00,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:04:00,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:04:00,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:04:00,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:04:00,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:04:00,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:04:00,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:04:00,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:04:00,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:04:00,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:04:00,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:04:00,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:04:00,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:04:00,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:04:00,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:04:00,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:04:00,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:04:00,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:04:00,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:04:00,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:04:00,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:04:00,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:04:00,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:04:00,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:04:00,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:04:00,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:04:00,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:04:00,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:04:00,063 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:04:00,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:04:00,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:04:00,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:04:00,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:04:00,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:04:00,077 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:04:00,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:04:00,077 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:04:00,077 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:04:00,077 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:04:00,077 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:04:00,078 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:04:00,078 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:04:00,078 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:04:00,078 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:04:00,078 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:04:00,078 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:04:00,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:04:00,079 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:04:00,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:04:00,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:04:00,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:04:00,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:04:00,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:04:00,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:04:00,080 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:04:00,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:04:00,081 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:04:00,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:04:00,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:04:00,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:04:00,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:04:00,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:04:00,081 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:04:00,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:04:00,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:04:00,082 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:04:00,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:04:00,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:04:00,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:04:00,082 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_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bec73cbd355af8995620266d1bb50e13212a1740ed8bd583620b6985b8fd569c [2022-12-14 10:04:00,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:04:00,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:04:00,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:04:00,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:04:00,265 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:04:00,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2022-12-14 10:04:02,798 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:04:02,971 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:04:02,972 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2022-12-14 10:04:02,976 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/data/05ae76a3b/425a8bfdb6e94ffdba36a316a88b5195/FLAG7f4d9b187 [2022-12-14 10:04:03,370 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/data/05ae76a3b/425a8bfdb6e94ffdba36a316a88b5195 [2022-12-14 10:04:03,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:04:03,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:04:03,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:04:03,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:04:03,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:04:03,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3edd7283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03, skipping insertion in model container [2022-12-14 10:04:03,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:04:03,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:04:03,484 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_7b619713-c9c8-4e28-a5b7-a7cf94c08674/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2022-12-14 10:04:03,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:04:03,502 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:04:03,510 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_7b619713-c9c8-4e28-a5b7-a7cf94c08674/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2022-12-14 10:04:03,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:04:03,523 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:04:03,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03 WrapperNode [2022-12-14 10:04:03,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:04:03,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:04:03,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:04:03,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:04:03,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,545 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-12-14 10:04:03,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:04:03,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:04:03,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:04:03,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:04:03,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:04:03,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:04:03,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:04:03,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:04:03,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (1/1) ... [2022-12-14 10:04:03,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:04:03,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:04:03,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:04:03,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:04:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:04:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:04:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:04:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:04:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:04:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:04:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:04:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:04:03,672 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:04:03,674 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:04:03,750 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:04:03,769 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:04:03,769 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 10:04:03,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:04:03 BoogieIcfgContainer [2022-12-14 10:04:03,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:04:03,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:04:03,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:04:03,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:04:03,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:04:03" (1/3) ... [2022-12-14 10:04:03,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f78a37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:04:03, skipping insertion in model container [2022-12-14 10:04:03,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:04:03" (2/3) ... [2022-12-14 10:04:03,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f78a37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:04:03, skipping insertion in model container [2022-12-14 10:04:03,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:04:03" (3/3) ... [2022-12-14 10:04:03,777 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2022-12-14 10:04:03,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:04:03,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:04:03,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:04:03,826 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;@238f5f25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:04:03,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:04:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:04:03,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:03,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:04:03,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:03,838 INFO L85 PathProgramCache]: Analyzing trace with hash 72620913, now seen corresponding path program 1 times [2022-12-14 10:04:03,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:03,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391406494] [2022-12-14 10:04:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:03,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:03,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391406494] [2022-12-14 10:04:03,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391406494] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:04:03,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:04:03,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:04:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772127746] [2022-12-14 10:04:03,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:04:03,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:04:03,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:04,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:04:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:04:04,023 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:04,063 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-12-14 10:04:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:04:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:04:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:04,072 INFO L225 Difference]: With dead ends: 21 [2022-12-14 10:04:04,073 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 10:04:04,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:04:04,078 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:04,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:04:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 10:04:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 7. [2022-12-14 10:04:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2022-12-14 10:04:04,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2022-12-14 10:04:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:04,104 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2022-12-14 10:04:04,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2022-12-14 10:04:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:04:04,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:04,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:04:04,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:04:04,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2047454428, now seen corresponding path program 1 times [2022-12-14 10:04:04,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:04,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377981446] [2022-12-14 10:04:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:04,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:04,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:04,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377981446] [2022-12-14 10:04:04,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377981446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:04:04,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643635486] [2022-12-14 10:04:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:04,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:04,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:04:04,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:04:04,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:04:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:04:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:04,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:04:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:04,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643635486] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:04:04,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012928112] [2022-12-14 10:04:04,321 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:04:04,321 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:04:04,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:04:04,328 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:04:04,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:04:04,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:04,428 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:04:04,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 10:04:04,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:04,452 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 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 10:04:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:04,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 10:04:04,615 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-12-14 10:04:04,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 218 treesize of output 208 [2022-12-14 10:04:04,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:04:04,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:04:04,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:04:04,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2012928112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:04:04,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:04:04,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2022-12-14 10:04:04,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035801771] [2022-12-14 10:04:04,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:04:04,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:04:04,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:04,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:04:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:04:04,820 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:04,846 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-12-14 10:04:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:04:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:04:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:04,847 INFO L225 Difference]: With dead ends: 15 [2022-12-14 10:04:04,847 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 10:04:04,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:04:04,849 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:04,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:04:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 10:04:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 8. [2022-12-14 10:04:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 10:04:04,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-12-14 10:04:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:04,853 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 10:04:04,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 10:04:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:04:04,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:04,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:04:04,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:04:05,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:05,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:05,057 INFO L85 PathProgramCache]: Analyzing trace with hash 952665837, now seen corresponding path program 1 times [2022-12-14 10:04:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:05,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312690422] [2022-12-14 10:04:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:05,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:04:05,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312690422] [2022-12-14 10:04:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312690422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:04:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369914990] [2022-12-14 10:04:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:05,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:04:05,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:04:05,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:04:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:04:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:04:05,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:04:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:04:05,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369914990] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:04:05,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766541919] [2022-12-14 10:04:05,252 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:04:05,252 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:04:05,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:04:05,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:04:05,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:04:05,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:05,280 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 10:04:05,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 10:04:05,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:05,309 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:04:05,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 10:04:05,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:05,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:04:05,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:04:05,386 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 10:04:05,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 212 treesize of output 209 [2022-12-14 10:04:05,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:04:05,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:04:05,597 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:04:05,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#in~0#1.base|) (<= 0 |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~i~0#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~idx_in~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (not (<= (mod |ULTIMATE.start_main_~c~0#1| 256) 57)) (not (<= 48 (mod |ULTIMATE.start_main_~c~0#1| 256)))) (= |ULTIMATE.start_main_~#in~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 10:04:05,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:04:05,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:04:05,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 10:04:05,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210625251] [2022-12-14 10:04:05,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:04:05,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:04:05,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:04:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:04:05,703 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:05,728 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-12-14 10:04:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:04:05,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:04:05,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:05,728 INFO L225 Difference]: With dead ends: 20 [2022-12-14 10:04:05,728 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 10:04:05,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:04:05,729 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:05,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:04:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 10:04:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2022-12-14 10:04:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-12-14 10:04:05,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2022-12-14 10:04:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:05,732 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-12-14 10:04:05,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-12-14 10:04:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:04:05,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:05,733 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 10:04:05,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:04:05,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:05,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1756662656, now seen corresponding path program 2 times [2022-12-14 10:04:05,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123289691] [2022-12-14 10:04:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:05,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:04:06,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:06,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123289691] [2022-12-14 10:04:06,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123289691] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:04:06,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108988661] [2022-12-14 10:04:06,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:04:06,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:06,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:04:06,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:04:06,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:04:06,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:04:06,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:04:06,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:04:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:04:06,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:04:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:04:15,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108988661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:04:15,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37770274] [2022-12-14 10:04:15,915 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:04:15,915 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:04:15,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:04:15,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:04:15,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:04:15,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:15,948 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:04:15,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 10:04:15,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:15,958 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 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 10:04:15,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:15,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 10:04:16,048 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-12-14 10:04:16,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 218 treesize of output 208 [2022-12-14 10:04:16,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:04:16,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:04:16,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:04:16,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '285#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#in~0#1.base|) (<= 0 |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~i~0#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~idx_in~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (not (<= (mod |ULTIMATE.start_main_~c~0#1| 256) 57)) (not (<= 48 (mod |ULTIMATE.start_main_~c~0#1| 256)))) (= |ULTIMATE.start_main_~#in~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 10:04:16,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:04:16,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:04:16,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-12-14 10:04:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193198274] [2022-12-14 10:04:16,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:04:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:04:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:04:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:04:16,289 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:18,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:04:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:18,478 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-12-14 10:04:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:04:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 10:04:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:18,479 INFO L225 Difference]: With dead ends: 21 [2022-12-14 10:04:18,479 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 10:04:18,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:04:18,480 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:18,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 23 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 10:04:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 10:04:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 10:04:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-12-14 10:04:18,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-12-14 10:04:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:18,484 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-12-14 10:04:18,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-12-14 10:04:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 10:04:18,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:18,484 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-12-14 10:04:18,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:04:18,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:18,685 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:18,685 INFO L85 PathProgramCache]: Analyzing trace with hash -746412403, now seen corresponding path program 3 times [2022-12-14 10:04:18,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:18,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451832759] [2022-12-14 10:04:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:18,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:04:18,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:18,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451832759] [2022-12-14 10:04:18,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451832759] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:04:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256515299] [2022-12-14 10:04:18,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:04:18,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:18,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:04:18,778 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:04:18,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:04:18,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:04:18,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:04:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:04:18,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:04:18,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:04:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:04:18,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256515299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:04:18,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787423249] [2022-12-14 10:04:18,881 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:04:18,881 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:04:18,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:04:18,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:04:18,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:04:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:18,914 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:04:18,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 10:04:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:18,925 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 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 10:04:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:18,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:04:18,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:04:18,994 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 10:04:18,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 212 treesize of output 209 [2022-12-14 10:04:19,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:04:19,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:04:19,162 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:04:19,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '447#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#in~0#1.base|) (<= 0 |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~i~0#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~idx_in~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (not (<= (mod |ULTIMATE.start_main_~c~0#1| 256) 57)) (not (<= 48 (mod |ULTIMATE.start_main_~c~0#1| 256)))) (= |ULTIMATE.start_main_~#in~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 10:04:19,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:04:19,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:04:19,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 10:04:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986463154] [2022-12-14 10:04:19,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:04:19,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:04:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:04:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:04:19,265 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:19,293 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-12-14 10:04:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:04:19,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 10:04:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:19,294 INFO L225 Difference]: With dead ends: 27 [2022-12-14 10:04:19,294 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 10:04:19,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:04:19,296 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:19,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:04:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 10:04:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 10:04:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-12-14 10:04:19,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-12-14 10:04:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:19,303 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-12-14 10:04:19,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:04:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-12-14 10:04:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 10:04:19,304 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:19,304 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1] [2022-12-14 10:04:19,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:04:19,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:19,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1055645267, now seen corresponding path program 4 times [2022-12-14 10:04:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:19,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124174227] [2022-12-14 10:04:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:19,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 10:04:19,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:19,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124174227] [2022-12-14 10:04:19,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124174227] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:04:19,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933195071] [2022-12-14 10:04:19,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:04:19,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:04:19,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:04:19,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:04:19,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:04:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 10:04:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:04:20,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:04:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,182 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 30 treesize of output 25 [2022-12-14 10:04:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,207 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 31 treesize of output 26 [2022-12-14 10:04:20,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,231 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 31 treesize of output 26 [2022-12-14 10:04:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,256 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 30 treesize of output 25 [2022-12-14 10:04:20,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,283 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 30 treesize of output 25 [2022-12-14 10:04:20,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,308 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 31 treesize of output 26 [2022-12-14 10:04:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,338 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 31 treesize of output 26 [2022-12-14 10:04:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,368 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 31 treesize of output 26 [2022-12-14 10:04:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,399 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 30 treesize of output 25 [2022-12-14 10:04:20,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:04:20,422 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 30 treesize of output 25 [2022-12-14 10:04:20,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 12 [2022-12-14 10:04:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:21,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:04:40,281 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:05:26,076 WARN L233 SmtUtils]: Spent 20.76s on a formula simplification. DAG size of input: 157 DAG size of output: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:05:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 10:05:26,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933195071] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:05:26,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534168918] [2022-12-14 10:05:26,312 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:05:26,313 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:05:26,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:05:26,313 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:05:26,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:05:26,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:05:26,344 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:05:26,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 10:05:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:05:26,353 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 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 10:05:26,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:05:26,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 10:05:26,416 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-12-14 10:05:26,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 218 treesize of output 208 [2022-12-14 10:05:26,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:05:26,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:05:26,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:05:26,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '667#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#in~0#1.base|) (<= 0 |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~i~0#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~idx_in~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (not (<= (mod |ULTIMATE.start_main_~c~0#1| 256) 57)) (not (<= 48 (mod |ULTIMATE.start_main_~c~0#1| 256)))) (= |ULTIMATE.start_main_~#in~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 10:05:26,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:05:26,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:05:26,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 7] total 25 [2022-12-14 10:05:26,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250895046] [2022-12-14 10:05:26,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:05:26,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:05:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:05:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:05:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=631, Unknown=8, NotChecked=0, Total=812 [2022-12-14 10:05:26,786 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:05:30,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 10:05:32,076 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#in~0#1.base|) |c_ULTIMATE.start_main_~#in~0#1.offset|)) (.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 10))) (and (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~c~0#1_38_49| Int) (|aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129| Int) (|aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60| Int) (|aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129| Int)) (let ((.cse7 (* |aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60| 256)) (.cse8 (* |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129| 4294967296))) (let ((.cse0 (+ .cse5 4294967504)) (.cse2 (+ .cse8 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129|)) (.cse1 (+ .cse7 .cse8 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129|)) (.cse3 (+ .cse5 4294967248)) (.cse6 (+ .cse7 .cse8 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129| (* 256 |aux_div_aux_mod_ULTIMATE.start_main_~c~0#1_38_49|)))) (or (>= |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129| 4294967296) (<= .cse0 .cse1) (< .cse2 .cse3) (let ((.cse4 (* 5 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129|))) (< (+ (* (div (+ 21474836479 (* (- 5) |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129|)) 128) 128) (* (div (+ (- 20401094652) .cse4) 2147483648) 4294967296) 21474836503) .cse4)) (<= .cse0 .cse2) (< .cse1 (+ .cse5 4294967296)) (> 0 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129|) (< .cse6 .cse3) (< (+ .cse5 4294967305) .cse6))))) (<= .cse9 127) (let ((.cse13 (* 5 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse11 (+ .cse13 1073741927)) (.cse15 (+ .cse13 1073741828)) (.cse16 (div (+ (- 1) (* (- 5) |c_ULTIMATE.start_main_~i~0#1|)) 128))) (let ((.cse10 (* .cse16 128)) (.cse12 (div .cse15 128)) (.cse14 (div .cse11 128))) (or (< (+ 23 .cse10 (* (div .cse11 2147483648) 2147483648) (* .cse12 128)) .cse13) (< (+ 23 (* 128 .cse14) .cse10 (* (div (+ .cse12 .cse14) 33554432) 2147483648)) .cse13) (< (+ (* (div .cse15 2147483648) 4294967296) 23 .cse10) .cse13) (< (* (div (+ .cse12 .cse16 .cse14) 16777216) 2147483648) (+ .cse13 1)))))) (<= 0 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~#in~0#1.offset| 0) (<= 0 (+ .cse9 128)) (forall ((|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221| Int) (|aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~c~0#1_38_49| Int) (|aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60| Int) (|aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| Int) (|aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71| Int)) (let ((.cse20 (* |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71| 4294967040)) (.cse27 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221| 4294967296)) (.cse28 (* |aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60| 256)) (.cse26 (* |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| 4294967296))) (let ((.cse21 (+ .cse27 .cse28 |aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| .cse26 (* 256 |aux_div_aux_mod_ULTIMATE.start_main_~c~0#1_38_49|))) (.cse25 (+ .cse5 4294967248 .cse20)) (.cse24 (* |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71| 4294967296)) (.cse19 (+ .cse27 |aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| .cse26)) (.cse18 (+ .cse5 4294967504 .cse20)) (.cse22 (+ .cse27 .cse28 |aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| .cse26)) (.cse23 (+ |aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| .cse26))) (or (let ((.cse17 (* 5 |aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193|))) (< (+ (* (div (+ (* |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71| (- 21474835200)) 1073741828 .cse17) 2147483648) 4294967296) 23 (* 128 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| (- 5))) 128)) (* |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71| 42949670400)) .cse17)) (<= .cse18 .cse19) (< (+ .cse5 4294967305 .cse20) .cse21) (< .cse22 (+ .cse5 4294967296 .cse20)) (<= (+ 4294967296 .cse20) .cse23) (< .cse19 (+ .cse5 .cse24 4294967248)) (< .cse19 .cse25) (< .cse21 .cse25) (<= (+ .cse5 4294967504 .cse24) .cse19) (< |aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193| 0) (< 2147483647 |aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_71_221_193|) (<= .cse18 .cse22) (< .cse23 .cse20))))))) is different from false [2022-12-14 10:05:45,253 WARN L233 SmtUtils]: Spent 8.98s on a formula simplification. DAG size of input: 46 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:07:08,696 WARN L233 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 176 DAG size of output: 165 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:07:10,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 10:07:28,053 WARN L233 SmtUtils]: Spent 15.40s on a formula simplification. DAG size of input: 143 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:07:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:28,126 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-12-14 10:07:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:07:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 10:07:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:28,128 INFO L225 Difference]: With dead ends: 28 [2022-12-14 10:07:28,128 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 10:07:28,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 161.6s TimeCoverageRelationStatistics Valid=264, Invalid=917, Unknown=13, NotChecked=66, Total=1260 [2022-12-14 10:07:28,129 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:28,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 192 Invalid, 2 Unknown, 2 Unchecked, 7.7s Time] [2022-12-14 10:07:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 10:07:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 10:07:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-12-14 10:07:28,136 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2022-12-14 10:07:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:28,136 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-12-14 10:07:28,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-12-14 10:07:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 10:07:28,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:28,137 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1] [2022-12-14 10:07:28,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 10:07:28,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 10:07:28,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:07:28,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1728648540, now seen corresponding path program 5 times [2022-12-14 10:07:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835207926] [2022-12-14 10:07:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:28,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 10:07:28,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835207926] [2022-12-14 10:07:28,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835207926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:07:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845077201] [2022-12-14 10:07:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:07:28,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:28,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:28,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:28,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:07:29,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:07:29,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 10:07:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 10:08:10,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:26,407 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 38 DAG size of output: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:08:56,867 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:09:36,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected |aux_div_aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~c~0#1_38_49_60_129_127| already exists [2022-12-14 10:09:36,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866859090] [2022-12-14 10:09:36,579 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 10:09:36,579 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:09:36,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:09:36,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:09:36,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:09:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:36,604 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:09:36,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 10:09:36,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:36,612 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 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 10:09:36,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:09:36,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 10:09:36,682 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-12-14 10:09:36,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 218 treesize of output 208 [2022-12-14 10:09:36,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:09:36,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:09:36,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:09:37,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '871#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#in~0#1.base|) (<= 0 |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~i~0#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~idx_in~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (not (<= (mod |ULTIMATE.start_main_~c~0#1| 256) 57)) (not (<= 48 (mod |ULTIMATE.start_main_~c~0#1| 256)))) (= |ULTIMATE.start_main_~#in~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 10:09:37,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:09:37,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:09:37,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-12-14 10:09:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241025108] [2022-12-14 10:09:37,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:37,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:09:37,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:37,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:09:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=276, Unknown=11, NotChecked=0, Total=380 [2022-12-14 10:09:37,644 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:45,186 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-12-14 10:09:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:09:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 10:09:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:45,187 INFO L225 Difference]: With dead ends: 27 [2022-12-14 10:09:45,187 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 10:09:45,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=122, Invalid=369, Unknown=15, NotChecked=0, Total=506 [2022-12-14 10:09:45,188 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:45,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 10:09:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 10:09:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-12-14 10:09:45,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2022-12-14 10:09:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:45,194 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-12-14 10:09:45,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-12-14 10:09:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 10:09:45,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:45,197 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1] [2022-12-14 10:09:45,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:45,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:09:45,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:45,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:45,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2049253523, now seen corresponding path program 6 times [2022-12-14 10:09:45,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:45,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027837283] [2022-12-14 10:09:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:45,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 10:09:46,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027837283] [2022-12-14 10:09:46,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027837283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85499000] [2022-12-14 10:09:46,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:09:46,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:46,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:46,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:46,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b619713-c9c8-4e28-a5b7-a7cf94c08674/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:10:55,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:10:55,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 115 conjunts are in the unsatisfiable core [2022-12-14 10:10:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:55,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:10:55,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,265 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 35 treesize of output 28 [2022-12-14 10:10:55,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,282 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 35 treesize of output 28 [2022-12-14 10:10:55,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:55,308 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 1 case distinctions, treesize of input 57 treesize of output 46 [2022-12-14 10:10:55,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:55,333 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 1 case distinctions, treesize of input 54 treesize of output 44 [2022-12-14 10:10:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:55,363 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 1 case distinctions, treesize of input 55 treesize of output 45 [2022-12-14 10:10:55,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:55,398 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 1 case distinctions, treesize of input 55 treesize of output 45 [2022-12-14 10:10:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:55,431 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 1 case distinctions, treesize of input 55 treesize of output 45 [2022-12-14 10:10:55,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:10:55,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:55,468 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 1 case distinctions, treesize of input 55 treesize of output 45 [2022-12-14 10:10:55,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:55,499 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 1 case distinctions, treesize of input 54 treesize of output 44 [2022-12-14 10:10:55,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:55,538 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 1 case distinctions, treesize of input 54 treesize of output 44 [2022-12-14 10:10:56,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:10:56,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 132 [2022-12-14 10:16:15,942 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 209 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)