./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/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_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/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_35e4f349-defe-4819-a1e1-0c4e36215251/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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:31:16,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:31:16,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:31:16,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:31:16,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:31:16,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:31:16,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:31:16,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:31:16,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:31:16,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:31:16,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:31:16,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:31:16,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:31:16,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:31:16,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:31:16,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:31:16,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:31:16,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:31:16,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:31:16,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:31:16,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:31:16,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:31:16,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:31:16,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:31:16,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:31:16,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:31:16,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:31:16,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:31:16,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:31:16,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:31:16,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:31:16,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:31:16,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:31:16,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:31:16,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:31:16,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:31:16,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:31:16,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:31:16,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:31:16,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:31:16,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:31:16,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:31:16,100 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:31:16,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:31:16,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:31:16,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:31:16,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:31:16,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:31:16,102 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:31:16,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:31:16,102 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:31:16,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:31:16,103 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:31:16,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:31:16,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:31:16,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:31:16,103 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:31:16,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:31:16,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:31:16,104 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:31:16,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:31:16,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:31:16,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:31:16,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:31:16,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:31:16,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:31:16,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:31:16,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:31:16,106 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:31:16,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:31:16,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:31:16,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:31:16,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:31:16,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:31:16,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:31:16,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:31:16,107 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:31:16,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:31:16,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:31:16,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:31:16,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:31:16,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:31:16,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:31:16,108 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_35e4f349-defe-4819-a1e1-0c4e36215251/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2022-12-14 11:31:16,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:31:16,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:31:16,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:31:16,319 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:31:16,320 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:31:16,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2022-12-14 11:31:19,049 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:31:19,174 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:31:19,174 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/sv-benchmarks/c/array-patterns/array4_pattern.c [2022-12-14 11:31:19,179 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/data/0396c8d08/6fe467ac594a4283932865819e1a93fc/FLAG35c947829 [2022-12-14 11:31:19,191 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/data/0396c8d08/6fe467ac594a4283932865819e1a93fc [2022-12-14 11:31:19,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:31:19,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:31:19,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:31:19,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:31:19,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:31:19,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb1c81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19, skipping insertion in model container [2022-12-14 11:31:19,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:31:19,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:31:19,358 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_35e4f349-defe-4819-a1e1-0c4e36215251/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-12-14 11:31:19,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:31:19,378 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:31:19,387 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_35e4f349-defe-4819-a1e1-0c4e36215251/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-12-14 11:31:19,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:31:19,403 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:31:19,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19 WrapperNode [2022-12-14 11:31:19,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:31:19,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:31:19,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:31:19,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:31:19,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,429 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2022-12-14 11:31:19,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:31:19,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:31:19,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:31:19,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:31:19,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,445 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:31:19,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:31:19,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:31:19,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:31:19,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (1/1) ... [2022-12-14 11:31:19,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:31:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:19,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:31:19,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:31:19,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:31:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 11:31:19,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 11:31:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:31:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:31:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:31:19,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:31:19,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:31:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:31:19,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:31:19,575 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:31:19,577 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:31:19,705 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:31:19,739 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:31:19,739 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 11:31:19,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:31:19 BoogieIcfgContainer [2022-12-14 11:31:19,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:31:19,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:31:19,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:31:19,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:31:19,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:31:19" (1/3) ... [2022-12-14 11:31:19,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdd47e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:31:19, skipping insertion in model container [2022-12-14 11:31:19,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:31:19" (2/3) ... [2022-12-14 11:31:19,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdd47e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:31:19, skipping insertion in model container [2022-12-14 11:31:19,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:31:19" (3/3) ... [2022-12-14 11:31:19,748 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2022-12-14 11:31:19,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:31:19,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:31:19,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:31:19,805 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;@bbbb21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:31:19,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:31:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:31:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:31:19,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:19,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:19,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:19,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1119781689, now seen corresponding path program 1 times [2022-12-14 11:31:19,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:19,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450016141] [2022-12-14 11:31:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:19,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:19,947 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 11:31:19,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450016141] [2022-12-14 11:31:19,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450016141] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:19,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:31:19,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:31:19,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753525599] [2022-12-14 11:31:19,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:19,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:31:19,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:31:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:31:19,978 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:31:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:20,012 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-12-14 11:31:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:31:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 11:31:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:20,021 INFO L225 Difference]: With dead ends: 29 [2022-12-14 11:31:20,021 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 11:31:20,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:31:20,028 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:20,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:31:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 11:31:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 11:31:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:31:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-12-14 11:31:20,065 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2022-12-14 11:31:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:20,067 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-12-14 11:31:20,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:31:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-12-14 11:31:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 11:31:20,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:20,069 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:31:20,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:20,071 INFO L85 PathProgramCache]: Analyzing trace with hash -166120417, now seen corresponding path program 1 times [2022-12-14 11:31:20,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:20,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886506189] [2022-12-14 11:31:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:20,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:20,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:20,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088020961] [2022-12-14 11:31:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:20,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:20,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:20,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:20,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:31:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:31:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:31:20,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:31:20,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:20,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886506189] [2022-12-14 11:31:20,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:31:20,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088020961] [2022-12-14 11:31:20,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088020961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:20,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:31:20,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:31:20,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773822986] [2022-12-14 11:31:20,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:20,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:31:20,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:31:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:31:20,279 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 11:31:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:20,311 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-12-14 11:31:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:31:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2022-12-14 11:31:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:20,312 INFO L225 Difference]: With dead ends: 24 [2022-12-14 11:31:20,312 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 11:31:20,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:31:20,314 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:20,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:31:20,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 11:31:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 11:31:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:31:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-12-14 11:31:20,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 27 [2022-12-14 11:31:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:20,318 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-12-14 11:31:20,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 11:31:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-12-14 11:31:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 11:31:20,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:20,319 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:20,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:31:20,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:20,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -855080832, now seen corresponding path program 1 times [2022-12-14 11:31:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:20,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735841300] [2022-12-14 11:31:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:20,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:20,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:20,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500370755] [2022-12-14 11:31:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:20,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:20,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:20,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:20,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:31:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:20,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:31:20,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:31:20,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:31:20,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735841300] [2022-12-14 11:31:20,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:31:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500370755] [2022-12-14 11:31:20,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500370755] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:20,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:31:20,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:31:20,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134296871] [2022-12-14 11:31:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:31:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:31:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:31:20,673 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 11:31:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:20,732 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-12-14 11:31:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:31:20,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-12-14 11:31:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:20,734 INFO L225 Difference]: With dead ends: 39 [2022-12-14 11:31:20,734 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 11:31:20,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:31:20,736 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:20,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 67 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:31:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 11:31:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 11:31:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:31:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-12-14 11:31:20,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2022-12-14 11:31:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:20,743 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-12-14 11:31:20,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 11:31:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-12-14 11:31:20,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 11:31:20,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:20,745 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:20,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:31:20,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:20,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:20,949 INFO L85 PathProgramCache]: Analyzing trace with hash -70074783, now seen corresponding path program 1 times [2022-12-14 11:31:20,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:20,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313997280] [2022-12-14 11:31:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:21,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:21,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914747263] [2022-12-14 11:31:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:21,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:21,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:21,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:31:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:21,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 11:31:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:21,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 11:31:21,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:21,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 11:31:21,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:31:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:21,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 28 [2022-12-14 11:31:21,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:21,952 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:31:21,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 17 [2022-12-14 11:31:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:31:21,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:32,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:32,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313997280] [2022-12-14 11:31:32,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:31:32,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914747263] [2022-12-14 11:31:32,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914747263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:31:32,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773150310] [2022-12-14 11:31:32,166 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:31:32,167 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:31:32,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:31:32,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:31:32,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:31:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,316 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 11:31:32,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 11:31:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,407 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:31:32,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:31:32,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:31:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:32,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:32,591 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:31:32,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-12-14 11:31:32,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:32,684 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:31:32,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:31:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:32,893 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:31:32,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:31:33,015 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:31:33,018 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:31:34,663 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '553#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:31:34,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:31:34,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:31:34,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-12-14 11:31:34,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418375708] [2022-12-14 11:31:34,664 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 11:31:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:31:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:31:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1217, Unknown=4, NotChecked=0, Total=1406 [2022-12-14 11:31:34,667 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 11:31:36,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:31:39,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:31:41,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:31:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:41,268 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-12-14 11:31:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 11:31:41,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-12-14 11:31:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:41,270 INFO L225 Difference]: With dead ends: 66 [2022-12-14 11:31:41,271 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 11:31:41,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=280, Invalid=1972, Unknown=4, NotChecked=0, Total=2256 [2022-12-14 11:31:41,273 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 56 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:41,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 84 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 327 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time] [2022-12-14 11:31:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 11:31:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-12-14 11:31:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 11:31:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-12-14 11:31:41,290 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 29 [2022-12-14 11:31:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:41,290 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-12-14 11:31:41,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 11:31:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-12-14 11:31:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 11:31:41,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:41,292 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:41,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 11:31:41,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:41,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1504691040, now seen corresponding path program 2 times [2022-12-14 11:31:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:41,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592376100] [2022-12-14 11:31:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:41,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:41,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:41,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771609691] [2022-12-14 11:31:41,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:31:41,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:41,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:41,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:41,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:31:41,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:31:41,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:31:41,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:31:41,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:31:41,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:41,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592376100] [2022-12-14 11:31:41,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:31:41,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771609691] [2022-12-14 11:31:41,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771609691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:41,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374787631] [2022-12-14 11:31:41,692 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:31:41,692 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:31:41,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:31:41,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:31:41,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:31:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:41,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:41,781 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:31:41,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:31:41,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:41,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:41,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:31:41,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:41,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:41,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:31:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:41,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:41,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:41,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:41,987 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:31:41,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-12-14 11:31:42,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:42,185 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:31:42,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:31:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:42,371 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:31:42,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:31:42,487 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:31:42,488 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:31:43,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:31:43,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:31:43,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:31:43,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 11:31:43,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282634067] [2022-12-14 11:31:43,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:31:43,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:31:43,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:43,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:31:43,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:31:43,702 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:31:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:43,827 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-12-14 11:31:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:31:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2022-12-14 11:31:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:43,829 INFO L225 Difference]: With dead ends: 74 [2022-12-14 11:31:43,829 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 11:31:43,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:31:43,831 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:43,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 117 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:31:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 11:31:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2022-12-14 11:31:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 11:31:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-12-14 11:31:43,842 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 30 [2022-12-14 11:31:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:43,842 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-12-14 11:31:43,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:31:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-12-14 11:31:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 11:31:43,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:43,843 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:43,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:31:44,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:44,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:44,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2122333822, now seen corresponding path program 3 times [2022-12-14 11:31:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:44,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634237718] [2022-12-14 11:31:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:44,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:44,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:44,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591619605] [2022-12-14 11:31:44,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:31:44,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:44,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:44,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:31:44,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:31:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:31:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:31:44,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:31:44,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:44,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634237718] [2022-12-14 11:31:44,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:31:44,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591619605] [2022-12-14 11:31:44,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591619605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:44,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204818675] [2022-12-14 11:31:44,238 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:31:44,238 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:31:44,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:31:44,239 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:31:44,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:31:44,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,329 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:31:44,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:31:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:31:44,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:31:44,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:44,470 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:31:44,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-12-14 11:31:44,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:44,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:31:44,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:31:44,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:44,726 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:31:44,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:31:44,824 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:31:44,825 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:31:45,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1365#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:31:45,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:31:45,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:31:45,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 11:31:45,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540505451] [2022-12-14 11:31:45,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:31:45,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:31:45,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:45,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:31:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:31:45,942 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:31:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:46,025 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-12-14 11:31:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:31:46,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2022-12-14 11:31:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:46,026 INFO L225 Difference]: With dead ends: 75 [2022-12-14 11:31:46,026 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 11:31:46,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-12-14 11:31:46,027 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:46,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 94 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:31:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 11:31:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-12-14 11:31:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 11:31:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-12-14 11:31:46,041 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 30 [2022-12-14 11:31:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:46,041 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-12-14 11:31:46,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:31:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-12-14 11:31:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 11:31:46,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:46,042 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:46,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:31:46,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:31:46,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash 598902815, now seen corresponding path program 4 times [2022-12-14 11:31:46,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:46,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000285993] [2022-12-14 11:31:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:46,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:46,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012159451] [2022-12-14 11:31:46,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:31:46,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:46,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:46,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:46,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:31:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 11:31:46,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:46,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 11:31:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:46,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 11:31:46,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 11:31:46,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:31:46,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:31:46,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:46,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:46,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-12-14 11:31:47,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:47,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:47,172 INFO L321 Elim1Store]: treesize reduction 64, result has 47.1 percent of original size [2022-12-14 11:31:47,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 93 [2022-12-14 11:31:47,431 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-12-14 11:31:47,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2022-12-14 11:31:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:31:47,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:47,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:47,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000285993] [2022-12-14 11:31:47,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:31:47,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012159451] [2022-12-14 11:31:47,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012159451] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:31:47,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2022931429] [2022-12-14 11:31:47,909 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:31:47,909 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:31:47,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:31:47,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:31:47,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:31:47,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:47,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:47,972 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:31:47,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:31:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:47,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:31:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:48,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:31:48,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:48,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:48,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:48,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:48,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:48,180 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:31:48,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-12-14 11:31:48,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:48,277 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:31:48,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:31:48,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:48,868 INFO L321 Elim1Store]: treesize reduction 53, result has 39.1 percent of original size [2022-12-14 11:31:48,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 224 treesize of output 186 [2022-12-14 11:31:49,176 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-12-14 11:31:49,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:31:51,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1766#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:31:51,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:31:51,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:31:51,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-12-14 11:31:51,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295447809] [2022-12-14 11:31:51,752 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 11:31:51,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 11:31:51,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:51,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 11:31:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 11:31:51,754 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 11:31:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:52,766 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2022-12-14 11:31:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 11:31:52,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2022-12-14 11:31:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:52,767 INFO L225 Difference]: With dead ends: 92 [2022-12-14 11:31:52,767 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 11:31:52,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:31:52,768 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:52,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 145 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:31:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 11:31:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2022-12-14 11:31:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 49 states have internal predecessors, (55), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 11:31:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2022-12-14 11:31:52,780 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 31 [2022-12-14 11:31:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:52,780 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2022-12-14 11:31:52,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 11:31:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2022-12-14 11:31:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 11:31:52,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:52,781 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:52,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:31:52,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 11:31:52,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash 617181854, now seen corresponding path program 5 times [2022-12-14 11:31:52,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:52,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334228932] [2022-12-14 11:31:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:52,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:53,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:53,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500656467] [2022-12-14 11:31:53,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:31:53,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:53,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:53,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:53,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:31:53,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:31:53,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:53,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:31:53,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:31:53,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:31:53,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:53,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334228932] [2022-12-14 11:31:53,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:31:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500656467] [2022-12-14 11:31:53,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500656467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980241597] [2022-12-14 11:31:53,212 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:31:53,212 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:31:53,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:31:53,212 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:31:53,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:31:53,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,281 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:31:53,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:31:53,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:31:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:31:53,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:53,425 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:31:53,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-12-14 11:31:53,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:53,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:31:53,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:31:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:53,733 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:31:53,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:31:53,826 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:31:53,827 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:31:55,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2267#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:31:55,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:31:55,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:31:55,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 11:31:55,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024740016] [2022-12-14 11:31:55,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:31:55,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:31:55,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:55,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:31:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:31:55,221 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:31:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:55,412 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2022-12-14 11:31:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:31:55,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2022-12-14 11:31:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:55,413 INFO L225 Difference]: With dead ends: 128 [2022-12-14 11:31:55,413 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 11:31:55,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:31:55,414 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 57 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:55,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 121 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:31:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 11:31:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2022-12-14 11:31:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 11:31:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-12-14 11:31:55,429 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 32 [2022-12-14 11:31:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:55,429 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-12-14 11:31:55,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:31:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-12-14 11:31:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 11:31:55,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:55,430 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:55,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:31:55,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:55,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1385802880, now seen corresponding path program 6 times [2022-12-14 11:31:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:55,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783412842] [2022-12-14 11:31:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:55,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:55,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835380187] [2022-12-14 11:31:55,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:31:55,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:55,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:55,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:55,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:31:55,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:31:55,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:55,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:31:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:31:55,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:31:55,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:31:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783412842] [2022-12-14 11:31:55,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:31:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835380187] [2022-12-14 11:31:55,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835380187] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [380357343] [2022-12-14 11:31:55,863 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:31:55,863 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:31:55,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:31:55,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:31:55,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:31:55,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:55,940 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:31:55,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:31:55,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:55,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:31:55,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:55,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:31:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:56,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:56,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:56,069 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:31:56,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-12-14 11:31:56,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:31:56,121 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:31:56,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:31:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:56,276 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:31:56,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:31:56,358 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:31:56,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:31:57,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2830#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:31:57,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:31:57,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:31:57,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 11:31:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796115588] [2022-12-14 11:31:57,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:31:57,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:31:57,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:31:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:31:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:31:57,617 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:31:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:57,796 INFO L93 Difference]: Finished difference Result 155 states and 199 transitions. [2022-12-14 11:31:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:31:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2022-12-14 11:31:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:57,797 INFO L225 Difference]: With dead ends: 155 [2022-12-14 11:31:57,797 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 11:31:57,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:31:57,798 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 102 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:57,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 133 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:31:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 11:31:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 92. [2022-12-14 11:31:57,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.125) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 11:31:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2022-12-14 11:31:57,817 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 32 [2022-12-14 11:31:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:57,817 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2022-12-14 11:31:57,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:31:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2022-12-14 11:31:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 11:31:57,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:57,819 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:57,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:31:58,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:58,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:31:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1952453089, now seen corresponding path program 7 times [2022-12-14 11:31:58,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:31:58,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313201154] [2022-12-14 11:31:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:58,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:31:58,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:31:58,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251096107] [2022-12-14 11:31:58,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:31:58,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:58,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:58,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:58,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:31:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:58,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 11:31:58,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:58,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 11:31:58,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:58,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 11:31:58,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 11:31:58,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:31:58,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:31:58,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:58,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:31:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:58,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:58,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-12-14 11:31:59,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:31:59,398 INFO L321 Elim1Store]: treesize reduction 98, result has 47.0 percent of original size [2022-12-14 11:31:59,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 129 [2022-12-14 11:31:59,917 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-12-14 11:31:59,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2022-12-14 11:31:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:31:59,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:00,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313201154] [2022-12-14 11:32:00,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251096107] [2022-12-14 11:32:00,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251096107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:32:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718589984] [2022-12-14 11:32:00,816 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:00,816 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:00,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:00,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:00,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:00,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:00,900 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 11:32:00,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 11:32:00,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:00,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:00,965 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:00,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:00,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:00,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:00,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:32:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:01,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:01,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:01,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:01,121 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:32:01,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-12-14 11:32:01,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:01,313 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:01,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:01,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:01,455 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:01,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:01,537 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:01,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:03,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3419#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:03,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:03,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:32:03,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-12-14 11:32:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420322639] [2022-12-14 11:32:03,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:03,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:32:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:03,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:32:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 11:32:03,802 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:32:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:05,426 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2022-12-14 11:32:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:32:05,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2022-12-14 11:32:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:05,428 INFO L225 Difference]: With dead ends: 123 [2022-12-14 11:32:05,428 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 11:32:05,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=376, Invalid=3284, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 11:32:05,429 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:05,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 123 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:32:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 11:32:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2022-12-14 11:32:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 66 states have internal predecessors, (74), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 11:32:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2022-12-14 11:32:05,447 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 33 [2022-12-14 11:32:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:05,447 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2022-12-14 11:32:05,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:32:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2022-12-14 11:32:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 11:32:05,448 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:05,448 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:05,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 11:32:05,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:32:05,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1956226912, now seen corresponding path program 8 times [2022-12-14 11:32:05,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:05,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501415427] [2022-12-14 11:32:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:05,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:05,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369922027] [2022-12-14 11:32:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:32:05,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:05,699 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:05,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:32:05,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:32:05,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:32:05,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:32:05,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:32:05,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501415427] [2022-12-14 11:32:05,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:05,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369922027] [2022-12-14 11:32:05,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369922027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:05,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297922471] [2022-12-14 11:32:05,953 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:05,953 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:05,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:05,953 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:05,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:05,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:05,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,039 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:06,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:32:06,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:32:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:06,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:06,171 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:32:06,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-12-14 11:32:06,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:06,238 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:06,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:06,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:06,421 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:06,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:06,507 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:06,508 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:07,839 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4033#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:07,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:07,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:32:07,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 11:32:07,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769079205] [2022-12-14 11:32:07,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:07,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 11:32:07,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 11:32:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:32:07,841 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:08,163 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2022-12-14 11:32:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:32:08,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2022-12-14 11:32:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:08,165 INFO L225 Difference]: With dead ends: 173 [2022-12-14 11:32:08,165 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 11:32:08,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:32:08,167 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 79 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:08,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 210 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:32:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 11:32:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 119. [2022-12-14 11:32:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 73 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-12-14 11:32:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2022-12-14 11:32:08,193 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 34 [2022-12-14 11:32:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:08,194 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2022-12-14 11:32:08,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2022-12-14 11:32:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 11:32:08,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:08,195 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:08,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 11:32:08,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:32:08,396 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:08,396 INFO L85 PathProgramCache]: Analyzing trace with hash 396188414, now seen corresponding path program 9 times [2022-12-14 11:32:08,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:08,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270982681] [2022-12-14 11:32:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:08,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:08,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:08,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329374738] [2022-12-14 11:32:08,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:32:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:08,410 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:08,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:32:08,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:32:08,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:32:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:32:08,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:32:08,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:08,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270982681] [2022-12-14 11:32:08,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:08,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329374738] [2022-12-14 11:32:08,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329374738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:08,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1003288400] [2022-12-14 11:32:08,659 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:08,659 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:08,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:08,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:08,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:08,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,741 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:08,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:32:08,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:32:08,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:08,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:08,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:08,887 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:32:08,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-12-14 11:32:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:08,936 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:08,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:09,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:09,087 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:09,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:09,167 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:09,168 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:10,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4727#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:10,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:10,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:32:10,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 11:32:10,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733471250] [2022-12-14 11:32:10,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:10,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 11:32:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 11:32:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:32:10,487 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:10,899 INFO L93 Difference]: Finished difference Result 248 states and 327 transitions. [2022-12-14 11:32:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 11:32:10,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2022-12-14 11:32:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:10,901 INFO L225 Difference]: With dead ends: 248 [2022-12-14 11:32:10,901 INFO L226 Difference]: Without dead ends: 239 [2022-12-14 11:32:10,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 11:32:10,902 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 144 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:10,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 214 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:32:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-12-14 11:32:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 120. [2022-12-14 11:32:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 74 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-12-14 11:32:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2022-12-14 11:32:10,926 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 34 [2022-12-14 11:32:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:10,927 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2022-12-14 11:32:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2022-12-14 11:32:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 11:32:10,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:10,927 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:10,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:32:11,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:11,128 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:11,129 INFO L85 PathProgramCache]: Analyzing trace with hash -513807329, now seen corresponding path program 10 times [2022-12-14 11:32:11,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:11,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473252120] [2022-12-14 11:32:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:11,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:11,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:11,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009953300] [2022-12-14 11:32:11,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:32:11,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:11,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:11,174 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:11,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:32:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:32:11,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-14 11:32:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:11,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 11:32:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:11,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-12-14 11:32:11,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-12-14 11:32:11,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 11:32:11,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2022-12-14 11:32:11,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-12-14 11:32:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:11,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2022-12-14 11:32:12,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:12,896 INFO L321 Elim1Store]: treesize reduction 132, result has 47.0 percent of original size [2022-12-14 11:32:12,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 165 [2022-12-14 11:32:14,122 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-12-14 11:32:14,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2022-12-14 11:32:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:32:14,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:16,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473252120] [2022-12-14 11:32:16,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009953300] [2022-12-14 11:32:16,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009953300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:32:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669525746] [2022-12-14 11:32:16,650 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:16,650 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:16,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:16,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:16,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:16,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,730 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:16,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:16,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:32:16,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:32:16,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:16,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:16,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:16,867 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:32:16,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-12-14 11:32:16,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:16,927 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:16,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:17,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:17,097 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:17,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:17,177 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:17,178 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:19,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5525#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:19,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:19,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:32:19,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-12-14 11:32:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816721542] [2022-12-14 11:32:19,984 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:19,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:32:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:32:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 11:32:19,985 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:32:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:22,730 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2022-12-14 11:32:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 11:32:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-12-14 11:32:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:22,731 INFO L225 Difference]: With dead ends: 153 [2022-12-14 11:32:22,731 INFO L226 Difference]: Without dead ends: 150 [2022-12-14 11:32:22,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=469, Invalid=4361, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 11:32:22,732 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:22,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 145 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:32:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-14 11:32:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 134. [2022-12-14 11:32:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 83 states have internal predecessors, (93), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 11:32:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2022-12-14 11:32:22,783 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 35 [2022-12-14 11:32:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:22,783 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2022-12-14 11:32:22,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:32:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2022-12-14 11:32:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 11:32:22,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:22,785 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:22,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 11:32:22,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:22,986 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:22,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1341095710, now seen corresponding path program 11 times [2022-12-14 11:32:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:22,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667389976] [2022-12-14 11:32:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:22,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:23,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:23,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255260937] [2022-12-14 11:32:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:32:23,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:23,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:23,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:23,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:32:23,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:32:23,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:23,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:32:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:32:23,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:32:23,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:23,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667389976] [2022-12-14 11:32:23,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:23,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255260937] [2022-12-14 11:32:23,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255260937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:23,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034754455] [2022-12-14 11:32:23,330 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:23,330 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:23,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:23,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:23,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:23,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,411 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 11:32:23,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 11:32:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,478 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:23,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:32:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:23,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:23,597 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:32:23,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-12-14 11:32:23,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:23,677 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:23,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:23,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:23,835 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:23,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:23,914 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:23,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:25,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6250#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:25,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:25,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:32:25,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 11:32:25,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754648015] [2022-12-14 11:32:25,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:25,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 11:32:25,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 11:32:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:32:25,154 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:25,474 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2022-12-14 11:32:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:32:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2022-12-14 11:32:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:25,475 INFO L225 Difference]: With dead ends: 219 [2022-12-14 11:32:25,475 INFO L226 Difference]: Without dead ends: 216 [2022-12-14 11:32:25,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 11:32:25,476 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 92 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:25,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 264 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:32:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-12-14 11:32:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 147. [2022-12-14 11:32:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 90 states have internal predecessors, (101), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-12-14 11:32:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 183 transitions. [2022-12-14 11:32:25,515 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 183 transitions. Word has length 36 [2022-12-14 11:32:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:25,515 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 183 transitions. [2022-12-14 11:32:25,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 183 transitions. [2022-12-14 11:32:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 11:32:25,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:25,516 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:25,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:32:25,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:32:25,717 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1251526784, now seen corresponding path program 12 times [2022-12-14 11:32:25,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:25,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567074922] [2022-12-14 11:32:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:25,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:25,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:25,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218693253] [2022-12-14 11:32:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:32:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:25,736 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:25,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:32:25,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:32:25,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:32:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:32:25,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:32:26,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567074922] [2022-12-14 11:32:26,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218693253] [2022-12-14 11:32:26,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218693253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639420375] [2022-12-14 11:32:26,041 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:26,042 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:26,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:26,042 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:26,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,111 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:26,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:26,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:32:26,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:32:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:26,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:26,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:26,267 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:32:26,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-12-14 11:32:26,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:26,428 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:26,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:26,568 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:26,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:26,643 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:26,644 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:27,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7077#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:27,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:27,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:32:27,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 11:32:27,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995203642] [2022-12-14 11:32:27,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:27,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 11:32:27,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 11:32:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:32:27,777 INFO L87 Difference]: Start difference. First operand 147 states and 183 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:28,465 INFO L93 Difference]: Finished difference Result 371 states and 495 transitions. [2022-12-14 11:32:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 11:32:28,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2022-12-14 11:32:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:28,467 INFO L225 Difference]: With dead ends: 371 [2022-12-14 11:32:28,467 INFO L226 Difference]: Without dead ends: 361 [2022-12-14 11:32:28,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 11:32:28,469 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 415 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:28,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 288 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:32:28,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-12-14 11:32:28,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 148. [2022-12-14 11:32:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 91 states have internal predecessors, (101), 41 states have call successors, (41), 16 states have call predecessors, (41), 16 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-12-14 11:32:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2022-12-14 11:32:28,532 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 36 [2022-12-14 11:32:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:28,533 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2022-12-14 11:32:28,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2022-12-14 11:32:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 11:32:28,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:28,533 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:28,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 11:32:28,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:28,734 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1376021151, now seen corresponding path program 13 times [2022-12-14 11:32:28,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:28,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508134242] [2022-12-14 11:32:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:28,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:28,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:28,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035928969] [2022-12-14 11:32:28,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:32:28,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:28,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:28,755 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:28,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:32:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:32:28,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 141 conjunts are in the unsatisfiable core [2022-12-14 11:32:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:28,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 11:32:29,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-12-14 11:32:29,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-12-14 11:32:29,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 11:32:29,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2022-12-14 11:32:29,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-12-14 11:32:29,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 115 [2022-12-14 11:32:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:29,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2022-12-14 11:32:30,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:30,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:30,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:30,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:30,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:30,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:30,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:30,766 INFO L321 Elim1Store]: treesize reduction 166, result has 47.0 percent of original size [2022-12-14 11:32:30,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 201 [2022-12-14 11:32:32,946 INFO L321 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-12-14 11:32:32,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2022-12-14 11:32:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:32:33,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:35,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508134242] [2022-12-14 11:32:35,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035928969] [2022-12-14 11:32:35,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035928969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:32:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213401322] [2022-12-14 11:32:35,841 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:35,841 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:35,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:35,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:35,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:35,924 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:35,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:35,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:35,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:35,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:32:35,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:35,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:32:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:36,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:36,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:36,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:36,069 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 11:32:36,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-12-14 11:32:36,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:36,140 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:36,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:36,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:36,301 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:36,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:36,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:36,391 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:39,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8134#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:39,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:39,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:32:39,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-12-14 11:32:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934732441] [2022-12-14 11:32:39,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:39,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 11:32:39,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 11:32:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3113, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 11:32:39,619 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:32:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:43,533 INFO L93 Difference]: Finished difference Result 183 states and 227 transitions. [2022-12-14 11:32:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 11:32:43,534 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2022-12-14 11:32:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:43,534 INFO L225 Difference]: With dead ends: 183 [2022-12-14 11:32:43,534 INFO L226 Difference]: Without dead ends: 180 [2022-12-14 11:32:43,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=492, Invalid=4910, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 11:32:43,536 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:43,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 158 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 11:32:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-14 11:32:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2022-12-14 11:32:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 100 states have internal predecessors, (112), 45 states have call successors, (45), 17 states have call predecessors, (45), 17 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2022-12-14 11:32:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-12-14 11:32:43,577 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 37 [2022-12-14 11:32:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:43,577 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-12-14 11:32:43,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:32:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-12-14 11:32:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 11:32:43,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:43,578 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:43,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:32:43,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 11:32:43,778 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1225628512, now seen corresponding path program 14 times [2022-12-14 11:32:43,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:43,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092370692] [2022-12-14 11:32:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:43,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:43,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:43,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060659013] [2022-12-14 11:32:43,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:32:43,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:43,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:43,791 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:43,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 11:32:43,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:32:43,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:32:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:32:44,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:32:44,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092370692] [2022-12-14 11:32:44,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:44,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060659013] [2022-12-14 11:32:44,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060659013] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:44,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536792161] [2022-12-14 11:32:44,112 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:44,112 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:44,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:44,113 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:44,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:44,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,188 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:44,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:44,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:32:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:32:44,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:44,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:44,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:44,332 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:32:44,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-12-14 11:32:44,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:44,449 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:44,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:44,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:44,634 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:44,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:44,708 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:44,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:46,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8968#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:46,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:46,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:32:46,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-12-14 11:32:46,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493454605] [2022-12-14 11:32:46,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:46,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 11:32:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 11:32:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:32:46,085 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:46,636 INFO L93 Difference]: Finished difference Result 266 states and 330 transitions. [2022-12-14 11:32:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 11:32:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2022-12-14 11:32:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:46,639 INFO L225 Difference]: With dead ends: 266 [2022-12-14 11:32:46,639 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 11:32:46,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 11:32:46,640 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:46,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 335 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:32:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 11:32:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 175. [2022-12-14 11:32:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 107 states have internal predecessors, (120), 49 states have call successors, (49), 19 states have call predecessors, (49), 19 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-12-14 11:32:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2022-12-14 11:32:46,690 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 38 [2022-12-14 11:32:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:46,690 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2022-12-14 11:32:46,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2022-12-14 11:32:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 11:32:46,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:46,691 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:46,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 11:32:46,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:32:46,892 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash 292702078, now seen corresponding path program 15 times [2022-12-14 11:32:46,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:46,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622761206] [2022-12-14 11:32:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:46,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:46,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541616031] [2022-12-14 11:32:46,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:32:46,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:46,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:46,930 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:46,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 11:32:47,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:32:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:32:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:32:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:32:47,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:32:47,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622761206] [2022-12-14 11:32:47,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:32:47,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541616031] [2022-12-14 11:32:47,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541616031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:47,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549302851] [2022-12-14 11:32:47,253 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 11:32:47,253 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:32:47,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:32:47,254 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:32:47,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:32:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,335 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 11:32:47,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 11:32:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 11:32:47,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 11:32:47,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:47,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:47,503 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 11:32:47,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-12-14 11:32:47,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:32:47,679 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:32:47,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-12-14 11:32:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:47,841 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-12-14 11:32:47,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-12-14 11:32:47,932 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-12-14 11:32:47,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:32:49,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9930#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:32:49,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:32:49,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:32:49,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-12-14 11:32:49,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679994156] [2022-12-14 11:32:49,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:49,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 11:32:49,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:32:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 11:32:49,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:32:49,433 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:50,552 INFO L93 Difference]: Finished difference Result 520 states and 699 transitions. [2022-12-14 11:32:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 11:32:50,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2022-12-14 11:32:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:50,554 INFO L225 Difference]: With dead ends: 520 [2022-12-14 11:32:50,554 INFO L226 Difference]: Without dead ends: 509 [2022-12-14 11:32:50,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 11:32:50,555 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 437 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:50,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 393 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:32:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-12-14 11:32:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 176. [2022-12-14 11:32:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 108 states have internal predecessors, (120), 49 states have call successors, (49), 19 states have call predecessors, (49), 19 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-12-14 11:32:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 218 transitions. [2022-12-14 11:32:50,611 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 218 transitions. Word has length 38 [2022-12-14 11:32:50,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:50,611 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 218 transitions. [2022-12-14 11:32:50,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 11:32:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 218 transitions. [2022-12-14 11:32:50,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 11:32:50,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:50,612 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:50,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 11:32:50,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 11:32:50,814 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:32:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash 659906591, now seen corresponding path program 16 times [2022-12-14 11:32:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:32:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347048174] [2022-12-14 11:32:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:32:50,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:32:50,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:32:50,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785160937] [2022-12-14 11:32:50,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:32:50,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:50,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:50,865 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:50,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e4f349-defe-4819-a1e1-0c4e36215251/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:32:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:32:51,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 159 conjunts are in the unsatisfiable core [2022-12-14 11:32:51,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:51,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 11:32:51,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 11:32:51,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:32:51,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 11:32:51,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 11:32:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-12-14 11:32:51,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 93 [2022-12-14 11:32:51,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 123 [2022-12-14 11:32:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:51,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 135 [2022-12-14 11:32:53,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:32:53,477 INFO L321 Elim1Store]: treesize reduction 200, result has 46.9 percent of original size [2022-12-14 11:32:53,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 237 [2022-12-14 11:32:56,797 INFO L321 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2022-12-14 11:32:56,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 470 treesize of output 218 [2022-12-14 11:32:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:32:56,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:33:16,787 WARN L233 SmtUtils]: Spent 14.05s on a formula simplification. DAG size of input: 34 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:34:04,003 WARN L233 SmtUtils]: Spent 27.68s on a formula simplification. DAG size of input: 28 DAG size of output: 25 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 11:34:04,004 INFO L321 Elim1Store]: treesize reduction 17, result has 66.0 percent of original size [2022-12-14 11:34:04,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 2764842 treesize of output 1766474 [2022-12-14 11:34:06,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:34:06,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 918565 treesize of output 649775