./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.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_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/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_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/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_fa81175e-9349-462a-b4f9-6e26ce9dc10b/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 599bde24b734dff8bcd3a53946a1033ced468fb55cf924fdefecd161d0c1af79 --- 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 15:29:39,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:29:39,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:29:39,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:29:39,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:29:39,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:29:39,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:29:39,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:29:39,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:29:39,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:29:39,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:29:39,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:29:39,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:29:39,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:29:39,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:29:39,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:29:39,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:29:39,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:29:39,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:29:39,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:29:39,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:29:39,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:29:39,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:29:39,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:29:39,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:29:39,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:29:39,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:29:39,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:29:39,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:29:39,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:29:39,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:29:39,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:29:39,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:29:39,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:29:39,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:29:39,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:29:39,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:29:39,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:29:39,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:29:39,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:29:39,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:29:39,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:29:39,435 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:29:39,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:29:39,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:29:39,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:29:39,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:29:39,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:29:39,437 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:29:39,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:29:39,437 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:29:39,437 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:29:39,437 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:29:39,437 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:29:39,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:29:39,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:29:39,438 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:29:39,438 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:29:39,438 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:29:39,438 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:29:39,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:29:39,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:29:39,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:29:39,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:29:39,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:29:39,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:29:39,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:29:39,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:29:39,440 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:29:39,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:29:39,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:29:39,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:29:39,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:29:39,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:29:39,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:29:39,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:29:39,441 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:29:39,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:29:39,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:29:39,441 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:29:39,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:29:39,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:29:39,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:29:39,442 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_fa81175e-9349-462a-b4f9-6e26ce9dc10b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 599bde24b734dff8bcd3a53946a1033ced468fb55cf924fdefecd161d0c1af79 [2022-12-14 15:29:39,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:29:39,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:29:39,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:29:39,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:29:39,626 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:29:39,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2022-12-14 15:29:42,270 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:29:42,392 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:29:42,393 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2022-12-14 15:29:42,397 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/data/532d3f232/eb172d5388bb4ac1b3280cbf6a1d443b/FLAG08a172eb8 [2022-12-14 15:29:42,407 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/data/532d3f232/eb172d5388bb4ac1b3280cbf6a1d443b [2022-12-14 15:29:42,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:29:42,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:29:42,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:29:42,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:29:42,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:29:42,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd91ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42, skipping insertion in model container [2022-12-14 15:29:42,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:29:42,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:29:42,558 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_fa81175e-9349-462a-b4f9-6e26ce9dc10b/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c[420,433] [2022-12-14 15:29:42,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:29:42,574 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:29:42,583 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_fa81175e-9349-462a-b4f9-6e26ce9dc10b/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c[420,433] [2022-12-14 15:29:42,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:29:42,595 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:29:42,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42 WrapperNode [2022-12-14 15:29:42,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:29:42,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:29:42,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:29:42,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:29:42,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,619 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-12-14 15:29:42,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:29:42,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:29:42,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:29:42,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:29:42,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,632 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:29:42,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:29:42,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:29:42,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:29:42,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (1/1) ... [2022-12-14 15:29:42,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:29:42,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:42,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:29:42,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:29:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:29:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:29:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:29:42,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 15:29:42,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:29:42,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:29:42,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 15:29:42,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:29:42,733 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:29:42,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:29:42,805 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:29:42,829 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:29:42,829 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 15:29:42,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:29:42 BoogieIcfgContainer [2022-12-14 15:29:42,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:29:42,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:29:42,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:29:42,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:29:42,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:29:42" (1/3) ... [2022-12-14 15:29:42,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63158e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:29:42, skipping insertion in model container [2022-12-14 15:29:42,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:29:42" (2/3) ... [2022-12-14 15:29:42,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63158e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:29:42, skipping insertion in model container [2022-12-14 15:29:42,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:29:42" (3/3) ... [2022-12-14 15:29:42,837 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2022-12-14 15:29:42,852 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:29:42,852 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:29:42,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:29:42,890 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;@76af0a2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:29:42,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:29:42,893 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 15:29:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 15:29:42,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:42,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 15:29:42,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash 72684179, now seen corresponding path program 1 times [2022-12-14 15:29:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:42,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184615189] [2022-12-14 15:29:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:43,064 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 15:29:43,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:43,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184615189] [2022-12-14 15:29:43,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184615189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:29:43,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:29:43,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:29:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116204367] [2022-12-14 15:29:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:29:43,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:29:43,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:43,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:29:43,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:29:43,102 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 15:29:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:43,133 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-12-14 15:29:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:29:43,136 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 15:29:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:43,141 INFO L225 Difference]: With dead ends: 15 [2022-12-14 15:29:43,141 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 15:29:43,143 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 15:29:43,145 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:43,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:29:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 15:29:43,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 15:29:43,167 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 15:29:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 15:29:43,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-12-14 15:29:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:43,168 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 15:29:43,169 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 15:29:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 15:29:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:29:43,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:43,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:29:43,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:29:43,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:43,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2045544120, now seen corresponding path program 1 times [2022-12-14 15:29:43,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:43,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830686444] [2022-12-14 15:29:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:43,272 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 15:29:43,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:43,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830686444] [2022-12-14 15:29:43,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830686444] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:43,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194321852] [2022-12-14 15:29:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:43,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:43,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:43,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:43,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:29:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:43,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:29:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:43,377 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 15:29:43,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:43,394 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 15:29:43,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194321852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:43,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1394222193] [2022-12-14 15:29:43,410 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 15:29:43,410 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:29:43,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:29:43,416 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:29:43,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:29:43,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,502 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 15:29:43,503 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 15:29:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,519 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 30 treesize of output 38 [2022-12-14 15:29:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 57 [2022-12-14 15:29:43,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:43,678 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 15:29:43,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 272 treesize of output 283 [2022-12-14 15:29:43,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2022-12-14 15:29:43,802 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:29:43,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '82#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= 100000 |ULTIMATE.start_main_~N~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 15:29:43,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:29:43,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:29:43,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-14 15:29:43,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625051550] [2022-12-14 15:29:43,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:43,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:29:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:29:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:29:43,929 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 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 15:29:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:43,946 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-12-14 15:29:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:29:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 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 6 [2022-12-14 15:29:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:43,947 INFO L225 Difference]: With dead ends: 16 [2022-12-14 15:29:43,947 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 15:29:43,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:29:43,949 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:43,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:29:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 15:29:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 15:29:43,951 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 15:29:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-12-14 15:29:43,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-12-14 15:29:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:43,951 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-12-14 15:29:43,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 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 15:29:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-12-14 15:29:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 15:29:43,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:43,952 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-12-14 15:29:43,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:29:44,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:44,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1273784365, now seen corresponding path program 2 times [2022-12-14 15:29:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:44,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502596295] [2022-12-14 15:29:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:44,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:44,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502596295] [2022-12-14 15:29:44,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502596295] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663466951] [2022-12-14 15:29:44,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:29:44,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:44,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:44,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:44,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:29:44,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:29:44,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:29:44,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 15:29:44,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:44,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663466951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771374072] [2022-12-14 15:29:44,440 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 15:29:44,440 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:29:44,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:29:44,441 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:29:44,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:29:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,486 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 15:29:44,486 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 15:29:44,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,498 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 30 treesize of output 38 [2022-12-14 15:29:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 57 [2022-12-14 15:29:44,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:44,580 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 15:29:44,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 272 treesize of output 283 [2022-12-14 15:29:44,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2022-12-14 15:29:44,641 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:29:44,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= 100000 |ULTIMATE.start_main_~N~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 15:29:44,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:29:44,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:29:44,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-14 15:29:44,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804318189] [2022-12-14 15:29:44,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:44,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 15:29:44,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 15:29:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=231, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:29:44,752 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 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 15:29:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:44,775 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-12-14 15:29:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:29:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 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) Word has length 9 [2022-12-14 15:29:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:44,776 INFO L225 Difference]: With dead ends: 22 [2022-12-14 15:29:44,776 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 15:29:44,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=231, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:29:44,777 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:44,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:29:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 15:29:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 15:29:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 15:29:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-12-14 15:29:44,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-12-14 15:29:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:44,780 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-12-14 15:29:44,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 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 15:29:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-12-14 15:29:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 15:29:44,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:44,781 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-14 15:29:44,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:29:44,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:44,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash 904508339, now seen corresponding path program 3 times [2022-12-14 15:29:44,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:44,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295518088] [2022-12-14 15:29:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:44,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:45,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295518088] [2022-12-14 15:29:45,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295518088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769174901] [2022-12-14 15:29:45,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:29:45,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:45,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:45,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:29:45,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:29:45,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:29:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:29:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:45,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:45,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769174901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:45,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707001336] [2022-12-14 15:29:45,634 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 15:29:45,635 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:29:45,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:29:45,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:29:45,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:29:45,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,666 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 15:29:45,666 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 30 treesize of output 46 [2022-12-14 15:29:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,699 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 15:29:45,700 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 15:29:45,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2022-12-14 15:29:45,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:29:45,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:45,803 INFO L321 Elim1Store]: treesize reduction 86, result has 37.2 percent of original size [2022-12-14 15:29:45,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 290 [2022-12-14 15:29:46,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2022-12-14 15:29:46,228 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:29:46,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '378#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= 100000 |ULTIMATE.start_main_~N~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 15:29:46,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:29:46,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:29:46,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-12-14 15:29:46,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522794766] [2022-12-14 15:29:46,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:46,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 15:29:46,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 15:29:46,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=819, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 15:29:46,320 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 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 15:29:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:46,363 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2022-12-14 15:29:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:29:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 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 15 [2022-12-14 15:29:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:46,364 INFO L225 Difference]: With dead ends: 34 [2022-12-14 15:29:46,364 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 15:29:46,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=663, Invalid=819, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 15:29:46,365 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:46,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:29:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 15:29:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 15:29:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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 15:29:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-12-14 15:29:46,369 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2022-12-14 15:29:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:46,370 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-12-14 15:29:46,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 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 15:29:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-12-14 15:29:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 15:29:46,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:46,370 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2022-12-14 15:29:46,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:29:46,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:46,571 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash 102675315, now seen corresponding path program 4 times [2022-12-14 15:29:46,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:46,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682422023] [2022-12-14 15:29:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:46,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:47,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682422023] [2022-12-14 15:29:47,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682422023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232484811] [2022-12-14 15:29:47,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:29:47,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:47,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:47,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:29:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:47,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:29:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:29:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:47,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:29:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:47,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232484811] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:29:47,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330153447] [2022-12-14 15:29:47,905 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 15:29:47,905 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:29:47,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:29:47,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:29:47,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:29:47,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:47,931 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 15:29:47,931 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 30 treesize of output 46 [2022-12-14 15:29:47,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:47,956 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 15:29:47,956 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 15:29:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:47,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 46 [2022-12-14 15:29:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:29:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:29:48,045 INFO L321 Elim1Store]: treesize reduction 86, result has 37.2 percent of original size [2022-12-14 15:29:48,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 290 [2022-12-14 15:29:48,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2022-12-14 15:29:48,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:29:48,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '721#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= 100000 |ULTIMATE.start_main_~N~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 15:29:48,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:29:48,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:29:48,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2022-12-14 15:29:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998880917] [2022-12-14 15:29:48,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:29:48,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 15:29:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:29:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 15:29:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2475, Invalid=3075, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 15:29:48,338 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 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 15:29:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:29:48,416 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2022-12-14 15:29:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 15:29:48,417 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 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 27 [2022-12-14 15:29:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:29:48,417 INFO L225 Difference]: With dead ends: 58 [2022-12-14 15:29:48,417 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 15:29:48,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2475, Invalid=3075, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 15:29:48,419 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:29:48,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:29:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 15:29:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-14 15:29:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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 15:29:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-12-14 15:29:48,424 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2022-12-14 15:29:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:29:48,424 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-12-14 15:29:48,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 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 15:29:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-12-14 15:29:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 15:29:48,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:29:48,425 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2022-12-14 15:29:48,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:29:48,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:48,626 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:29:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:29:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1127469811, now seen corresponding path program 5 times [2022-12-14 15:29:48,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:29:48,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900840754] [2022-12-14 15:29:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:29:48,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:29:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:29:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:29:50,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:29:50,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900840754] [2022-12-14 15:29:50,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900840754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:29:50,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922697040] [2022-12-14 15:29:50,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:29:50,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:29:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:29:50,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:29:50,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa81175e-9349-462a-b4f9-6e26ce9dc10b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process