./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/nr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI --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 3219130777e42bfc39497c312a66c6d1b1af231a6df358861eaa545434d20cb1 --- 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-5e519f3 [2022-11-03 02:18:22,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:18:22,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:18:22,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:18:22,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:18:22,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:18:22,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:18:22,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:18:22,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:18:22,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:18:22,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:18:22,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:18:22,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:18:22,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:18:22,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:18:22,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:18:22,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:18:22,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:18:22,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:18:22,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:18:22,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:18:22,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:18:22,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:18:22,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:18:22,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:18:22,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:18:22,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:18:22,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:18:22,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:18:22,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:18:22,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:18:22,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:18:22,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:18:22,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:18:22,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:18:22,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:18:22,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:18:22,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:18:22,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:18:22,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:18:22,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:18:22,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:18:22,380 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:18:22,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:18:22,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:18:22,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:18:22,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:18:22,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:18:22,383 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:18:22,383 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:18:22,383 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:18:22,383 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:18:22,384 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:18:22,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:18:22,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:18:22,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:18:22,385 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:18:22,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:18:22,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:18:22,386 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:18:22,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:18:22,387 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:18:22,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:18:22,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:18:22,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:18:22,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:18:22,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:18:22,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:18:22,389 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:18:22,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:18:22,389 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:18:22,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:18:22,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:18:22,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:18:22,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:18:22,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:18:22,391 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:18:22,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:18:22,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:18:22,391 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:18:22,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:18:22,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:18:22,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:18:22,392 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_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3219130777e42bfc39497c312a66c6d1b1af231a6df358861eaa545434d20cb1 [2022-11-03 02:18:22,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:18:22,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:18:22,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:18:22,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:18:22,761 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:18:22,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-tiling/nr4.c [2022-11-03 02:18:22,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/data/153251d69/d405308e58a44ca89919b9363c872c30/FLAG5d9c64b25 [2022-11-03 02:18:23,415 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:18:23,415 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/sv-benchmarks/c/array-tiling/nr4.c [2022-11-03 02:18:23,422 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/data/153251d69/d405308e58a44ca89919b9363c872c30/FLAG5d9c64b25 [2022-11-03 02:18:23,779 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/data/153251d69/d405308e58a44ca89919b9363c872c30 [2022-11-03 02:18:23,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:18:23,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:18:23,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:18:23,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:18:23,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:18:23,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:23" (1/1) ... [2022-11-03 02:18:23,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d3afd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:23, skipping insertion in model container [2022-11-03 02:18:23,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:23" (1/1) ... [2022-11-03 02:18:23,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:18:23,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:18:24,070 WARN L230 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_b3d66de2-57aa-4daa-b255-6933ac1a9f70/sv-benchmarks/c/array-tiling/nr4.c[394,407] [2022-11-03 02:18:24,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:18:24,114 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:18:24,130 WARN L230 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_b3d66de2-57aa-4daa-b255-6933ac1a9f70/sv-benchmarks/c/array-tiling/nr4.c[394,407] [2022-11-03 02:18:24,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:18:24,170 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:18:24,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24 WrapperNode [2022-11-03 02:18:24,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:18:24,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:18:24,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:18:24,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:18:24,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,224 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-11-03 02:18:24,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:18:24,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:18:24,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:18:24,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:18:24,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,274 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:18:24,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:18:24,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:18:24,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:18:24,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (1/1) ... [2022-11-03 02:18:24,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:18:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:24,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:18:24,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:18:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:18:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:18:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:18:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:18:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:18:24,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:18:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:18:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:18:24,467 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:18:24,470 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:18:24,631 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:18:24,725 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:18:24,726 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:18:24,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:24 BoogieIcfgContainer [2022-11-03 02:18:24,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:18:24,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:18:24,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:18:24,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:18:24,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:18:23" (1/3) ... [2022-11-03 02:18:24,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a2909b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:24, skipping insertion in model container [2022-11-03 02:18:24,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:24" (2/3) ... [2022-11-03 02:18:24,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a2909b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:24, skipping insertion in model container [2022-11-03 02:18:24,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:24" (3/3) ... [2022-11-03 02:18:24,744 INFO L112 eAbstractionObserver]: Analyzing ICFG nr4.c [2022-11-03 02:18:24,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:18:24,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:18:24,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:18:24,847 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;@1858a052, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:18:24,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:18:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:18:24,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:24,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:24,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:24,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1525475312, now seen corresponding path program 1 times [2022-11-03 02:18:24,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:24,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261911720] [2022-11-03 02:18:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:24,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:25,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:25,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261911720] [2022-11-03 02:18:25,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261911720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:25,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:25,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:25,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228834401] [2022-11-03 02:18:25,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:25,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:25,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:25,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:25,484 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:25,613 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-03 02:18:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:18:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 02:18:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:25,624 INFO L225 Difference]: With dead ends: 26 [2022-11-03 02:18:25,624 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 02:18:25,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:25,630 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:25,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 02:18:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-03 02:18:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-03 02:18:25,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-11-03 02:18:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:25,665 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-03 02:18:25,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-03 02:18:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:18:25,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:25,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:25,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:18:25,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash 776722866, now seen corresponding path program 1 times [2022-11-03 02:18:25,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:25,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244282660] [2022-11-03 02:18:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:25,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:25,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:25,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244282660] [2022-11-03 02:18:25,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244282660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:25,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:25,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:18:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622996347] [2022-11-03 02:18:25,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:25,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:18:25,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:25,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:18:25,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:18:25,741 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:25,774 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2022-11-03 02:18:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:18:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:18:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:25,775 INFO L225 Difference]: With dead ends: 19 [2022-11-03 02:18:25,776 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 02:18:25,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:18:25,778 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:25,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:18:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 02:18:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 02:18:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-03 02:18:25,785 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-11-03 02:18:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:25,785 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-03 02:18:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-03 02:18:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:18:25,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:25,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:18:25,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1383686568, now seen corresponding path program 1 times [2022-11-03 02:18:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:25,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322061599] [2022-11-03 02:18:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:25,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:25,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322061599] [2022-11-03 02:18:25,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322061599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582437102] [2022-11-03 02:18:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:25,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:25,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:25,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:18:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:18:25,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:26,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:26,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582437102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:26,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301531016] [2022-11-03 02:18:26,041 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:18:26,042 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:26,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:26,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:26,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:26,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,216 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 02:18:26,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 02:18:26,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,291 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:18:26,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:18:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-11-03 02:18:26,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-11-03 02:18:26,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 3 [2022-11-03 02:18:26,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:18:26,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:18:26,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:26,919 INFO L356 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-03 02:18:26,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 248 [2022-11-03 02:18:27,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:18:27,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:18:27,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:18:27,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,246 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:18:27,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 175 [2022-11-03 02:18:27,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 194 [2022-11-03 02:18:27,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 221 treesize of output 207 [2022-11-03 02:18:27,438 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:18:27,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 193 [2022-11-03 02:18:27,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:18:27,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:18:27,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:18:27,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:18:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:27,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 176 [2022-11-03 02:18:27,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:18:27,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 104 [2022-11-03 02:18:27,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:18:27,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:18:27,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:28,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '178#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (<= |ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_#t~mem8#1|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:18:28,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:18:28,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:18:28,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 02:18:28,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636341249] [2022-11-03 02:18:28,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:28,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:28,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:28,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:28,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:18:28,518 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:28,558 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2022-11-03 02:18:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:18:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:18:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:28,560 INFO L225 Difference]: With dead ends: 23 [2022-11-03 02:18:28,560 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 02:18:28,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:18:28,562 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:28,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:18:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 02:18:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 02:18:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-03 02:18:28,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2022-11-03 02:18:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:28,570 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-03 02:18:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-03 02:18:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:18:28,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:28,571 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:28,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:18:28,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:28,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1993682126, now seen corresponding path program 2 times [2022-11-03 02:18:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:28,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681617631] [2022-11-03 02:18:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:28,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:29,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:29,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681617631] [2022-11-03 02:18:29,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681617631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303463992] [2022-11-03 02:18:29,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:18:29,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:29,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:29,753 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:29,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:18:29,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:18:29,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:18:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:18:29,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:29,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:18:29,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-11-03 02:18:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:18:29,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 31 [2022-11-03 02:18:30,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-03 02:18:30,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2022-11-03 02:18:30,087 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:18:30,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 19 treesize of output 29 [2022-11-03 02:18:30,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 22 treesize of output 11 [2022-11-03 02:18:30,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-11-03 02:18:30,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-11-03 02:18:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:30,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:30,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-03 02:18:32,483 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~j~0#1| Int)) (or (forall ((v_ArrVal_64 Int)) (let ((.cse0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 16 |c_ULTIMATE.start_main_~i~0#1|) (* |ULTIMATE.start_main_~j~0#1| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_64) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (= .cse0 0) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1))))) (< 1 |ULTIMATE.start_main_~j~0#1|))) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|)) is different from false [2022-11-03 02:18:32,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 51 [2022-11-03 02:18:42,620 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:18:42,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 151 treesize of output 147 [2022-11-03 02:18:44,904 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:18:44,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 50 [2022-11-03 02:18:44,915 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:18:44,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:18:44,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 118 treesize of output 103 [2022-11-03 02:18:44,963 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:18:44,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1605 treesize of output 1592 [2022-11-03 02:19:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-03 02:19:25,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303463992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:25,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [483363862] [2022-11-03 02:19:25,517 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:19:25,517 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:25,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:25,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:25,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:25,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,565 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 02:19:25,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 02:19:25,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,611 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:19:25,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:19:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-11-03 02:19:25,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:25,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,907 INFO L356 Elim1Store]: treesize reduction 327, result has 6.3 percent of original size [2022-11-03 02:19:25,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 780 treesize of output 799 [2022-11-03 02:19:25,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:25,982 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:25,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 629 treesize of output 622 [2022-11-03 02:19:26,466 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:19:26,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 518 treesize of output 478 [2022-11-03 02:19:26,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2022-11-03 02:19:26,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:26,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:26,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:26,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:26,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:26,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:26,759 INFO L356 Elim1Store]: treesize reduction 164, result has 15.0 percent of original size [2022-11-03 02:19:26,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 266 treesize of output 352 [2022-11-03 02:19:26,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:26,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:26,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:26,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:26,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:27,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:27,060 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:19:27,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 175 [2022-11-03 02:19:27,103 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:27,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 202 [2022-11-03 02:19:27,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 223 treesize of output 209 [2022-11-03 02:19:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:27,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 185 [2022-11-03 02:19:27,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:27,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:27,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:27,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:27,405 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:19:27,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 175 [2022-11-03 02:19:27,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:27,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 194 [2022-11-03 02:19:27,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 221 treesize of output 207 [2022-11-03 02:19:27,524 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:27,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 193 [2022-11-03 02:19:27,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:27,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:27,601 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:28,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '343#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (<= |ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_#t~mem8#1|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:28,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:28,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:28,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-11-03 02:19:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752403184] [2022-11-03 02:19:28,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:19:28,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:28,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:19:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=914, Unknown=2, NotChecked=64, Total=1190 [2022-11-03 02:19:28,245 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:30,296 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (forall ((|ULTIMATE.start_main_~j~0#1| Int)) (or (forall ((v_ArrVal_64 Int)) (let ((.cse0 (select (store .cse1 (+ (* 16 |c_ULTIMATE.start_main_~i~0#1|) (* |ULTIMATE.start_main_~j~0#1| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_64) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (= .cse0 0) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1))))) (< 1 |ULTIMATE.start_main_~j~0#1|))) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~j~0#1| 2) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (let ((.cse2 (select .cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse2 1)) (= .cse2 0))) (<= 2 |c_ULTIMATE.start_main_~j~0#1|) (= (select .cse1 0) 4) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2022-11-03 02:19:32,301 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (forall ((|ULTIMATE.start_main_~j~0#1| Int)) (or (forall ((v_ArrVal_64 Int)) (let ((.cse0 (select (store .cse1 (+ (* 16 |c_ULTIMATE.start_main_~i~0#1|) (* |ULTIMATE.start_main_~j~0#1| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_64) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (= .cse0 0) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1))))) (< 1 |ULTIMATE.start_main_~j~0#1|))) (<= |c_ULTIMATE.start_main_~j~0#1| 1) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= (select .cse1 0) 4) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2022-11-03 02:19:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:32,612 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-03 02:19:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:19:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:19:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:32,615 INFO L225 Difference]: With dead ends: 45 [2022-11-03 02:19:32,615 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 02:19:32,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=329, Invalid=1401, Unknown=4, NotChecked=246, Total=1980 [2022-11-03 02:19:32,617 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:32,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 42 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 127 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-11-03 02:19:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 02:19:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 17. [2022-11-03 02:19:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-03 02:19:32,624 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-11-03 02:19:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:32,625 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-03 02:19:32,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-03 02:19:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:19:32,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:32,626 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:32,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:19:32,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:32,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:32,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1323796800, now seen corresponding path program 1 times [2022-11-03 02:19:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:32,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059421057] [2022-11-03 02:19:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:32,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:33,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:33,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059421057] [2022-11-03 02:19:33,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059421057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:33,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898094181] [2022-11-03 02:19:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:33,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:33,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:33,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:19:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:33,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:19:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:33,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 50 [2022-11-03 02:19:33,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 15 [2022-11-03 02:19:33,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:19:33,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2022-11-03 02:19:33,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:33,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-11-03 02:19:33,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:19:33,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2022-11-03 02:19:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:33,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 [2022-11-03 02:19:33,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:19:33,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-11-03 02:19:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:33,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:34,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-11-03 02:19:34,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 59 [2022-11-03 02:19:36,239 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~j~0#1_60| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~j~0#1_60| 1) |c_ULTIMATE.start_main_~j~0#1|)) (forall ((v_ArrVal_108 Int) (v_ArrVal_106 Int)) (let ((.cse0 (select (let ((.cse1 (* 16 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_106) (+ (* |v_ULTIMATE.start_main_~j~0#1_60| (- 4)) .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_108)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1)) (= .cse0 0)))))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |c_ULTIMATE.start_main_~MINVAL~0#1| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~j~0#1|)) is different from false [2022-11-03 02:19:36,269 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:36,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 50 [2022-11-03 02:19:36,278 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:36,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:19:36,319 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:36,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 191 [2022-11-03 02:19:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-03 02:19:36,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898094181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:36,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461827338] [2022-11-03 02:19:36,521 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:19:36,521 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:36,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:36,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:36,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:36,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:36,572 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:19:36,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:19:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:36,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:19:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:36,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-11-03 02:19:36,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:36,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:36,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:36,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:36,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:36,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:36,815 INFO L356 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-11-03 02:19:36,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 504 treesize of output 564 [2022-11-03 02:19:37,112 INFO L356 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-11-03 02:19:37,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1002 treesize of output 948 [2022-11-03 02:19:37,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 897 treesize of output 887 [2022-11-03 02:19:37,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 916 treesize of output 884 [2022-11-03 02:19:37,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:37,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 903 treesize of output 886 [2022-11-03 02:19:37,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:37,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:37,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:37,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:37,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:37,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:37,806 INFO L356 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-03 02:19:37,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 248 [2022-11-03 02:19:37,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:37,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:37,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:37,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:37,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 176 [2022-11-03 02:19:37,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:37,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 148 treesize of output 134 [2022-11-03 02:19:37,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 104 [2022-11-03 02:19:38,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:38,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:38,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:38,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:38,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:38,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 176 [2022-11-03 02:19:38,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:38,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 148 treesize of output 134 [2022-11-03 02:19:38,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 104 [2022-11-03 02:19:38,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:38,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:38,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:39,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '573#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:39,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:39,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:39,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-11-03 02:19:39,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403205123] [2022-11-03 02:19:39,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:39,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:19:39,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:39,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:19:39,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=688, Unknown=1, NotChecked=54, Total=870 [2022-11-03 02:19:39,153 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:39,518 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-03 02:19:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:19:39,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 02:19:39,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:39,519 INFO L225 Difference]: With dead ends: 35 [2022-11-03 02:19:39,520 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 02:19:39,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=206, Invalid=1057, Unknown=1, NotChecked=68, Total=1332 [2022-11-03 02:19:39,525 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:39,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 27 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 147 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-03 02:19:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 02:19:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2022-11-03 02:19:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-03 02:19:39,544 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2022-11-03 02:19:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:39,545 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-03 02:19:39,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-03 02:19:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:19:39,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:39,547 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:39,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:39,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:39,763 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash 846033010, now seen corresponding path program 2 times [2022-11-03 02:19:39,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:39,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634935698] [2022-11-03 02:19:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:39,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:40,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:40,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634935698] [2022-11-03 02:19:40,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634935698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:40,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069114698] [2022-11-03 02:19:40,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:19:40,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:40,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:40,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:19:40,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:19:40,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:40,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:19:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:40,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 45 [2022-11-03 02:19:40,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 14 [2022-11-03 02:19:40,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 53 [2022-11-03 02:19:40,671 INFO L356 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-11-03 02:19:40,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 36 [2022-11-03 02:19:40,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:19:40,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 [2022-11-03 02:19:41,059 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 02:19:41,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 36 [2022-11-03 02:19:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:41,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:41,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-11-03 02:19:43,297 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~j~0#1| Int)) (or (forall ((v_ArrVal_149 Int)) (let ((.cse0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 16 |c_ULTIMATE.start_main_~i~0#1|) (* |ULTIMATE.start_main_~j~0#1| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_149) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1)) (= .cse0 0)))) (< 1 |ULTIMATE.start_main_~j~0#1|))) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|)) is different from false [2022-11-03 02:19:43,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:43,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 50 [2022-11-03 02:19:43,329 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:43,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:19:43,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 116 treesize of output 102 [2022-11-03 02:19:43,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 59 [2022-11-03 02:19:43,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2022-11-03 02:19:43,410 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:43,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 88 [2022-11-03 02:19:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-03 02:19:43,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069114698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:43,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901752801] [2022-11-03 02:19:43,537 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:19:43,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:43,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:43,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:43,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,592 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:19:43,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:19:43,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:19:43,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-11-03 02:19:43,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:43,848 INFO L356 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-11-03 02:19:43,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 504 treesize of output 564 [2022-11-03 02:19:44,016 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:19:44,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 579 treesize of output 553 [2022-11-03 02:19:44,046 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:44,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 510 treesize of output 496 [2022-11-03 02:19:44,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:44,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:44,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:44,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:44,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:44,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:44,524 INFO L356 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-03 02:19:44,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 248 [2022-11-03 02:19:44,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:44,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:44,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:44,680 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:19:44,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 175 [2022-11-03 02:19:44,721 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:44,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 202 [2022-11-03 02:19:44,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 223 treesize of output 209 [2022-11-03 02:19:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:44,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 185 [2022-11-03 02:19:44,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:44,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:44,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:44,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:45,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 176 [2022-11-03 02:19:45,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:45,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 104 [2022-11-03 02:19:45,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:45,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:45,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:45,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '820#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:45,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:45,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:45,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 29 [2022-11-03 02:19:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562392397] [2022-11-03 02:19:45,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:45,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 02:19:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 02:19:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1094, Unknown=1, NotChecked=68, Total=1332 [2022-11-03 02:19:45,953 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:48,044 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* 16 |c_ULTIMATE.start_main_~i~0#1|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (= (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8))) 2) (<= |c_ULTIMATE.start_main_~j~0#1| 1) (forall ((|ULTIMATE.start_main_~j~0#1| Int)) (or (forall ((v_ArrVal_149 Int)) (let ((.cse2 (select (store .cse0 (+ .cse1 (* |ULTIMATE.start_main_~j~0#1| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_149) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse2 1)) (= .cse2 0)))) (< 1 |ULTIMATE.start_main_~j~0#1|))) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (let ((.cse3 (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse3 1)) (= .cse3 0))) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2022-11-03 02:19:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:48,602 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-11-03 02:19:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:19:48,602 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:19:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:48,603 INFO L225 Difference]: With dead ends: 48 [2022-11-03 02:19:48,603 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 02:19:48,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=311, Invalid=1951, Unknown=2, NotChecked=186, Total=2450 [2022-11-03 02:19:48,605 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:48,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 193 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-11-03 02:19:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 02:19:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-11-03 02:19:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-03 02:19:48,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2022-11-03 02:19:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:48,618 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-03 02:19:48,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-03 02:19:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:19:48,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:48,624 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:48,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:48,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:48,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:48,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1306584064, now seen corresponding path program 3 times [2022-11-03 02:19:48,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:48,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063726692] [2022-11-03 02:19:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:48,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:49,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063726692] [2022-11-03 02:19:49,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063726692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829899123] [2022-11-03 02:19:49,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:19:49,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:49,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:49,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:19:49,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:19:49,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:49,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:19:49,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:49,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 43 [2022-11-03 02:19:49,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-03 02:19:50,028 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 02:19:50,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 36 [2022-11-03 02:19:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:50,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:50,187 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:50,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 50 [2022-11-03 02:19:50,196 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:50,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:19:50,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 02:19:50,228 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:50,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-11-03 02:19:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:50,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829899123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897778250] [2022-11-03 02:19:50,448 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:19:50,448 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:50,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:50,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:50,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:50,496 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 02:19:50,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 02:19:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:50,533 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:19:50,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:19:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:50,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-11-03 02:19:50,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:50,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:50,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:50,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:50,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:50,757 INFO L356 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-11-03 02:19:50,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 504 treesize of output 564 [2022-11-03 02:19:51,281 INFO L356 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-03 02:19:51,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1000 treesize of output 962 [2022-11-03 02:19:51,312 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:51,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 931 treesize of output 917 [2022-11-03 02:19:51,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:51,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:51,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:51,819 INFO L356 Elim1Store]: treesize reduction 164, result has 15.0 percent of original size [2022-11-03 02:19:51,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 266 treesize of output 352 [2022-11-03 02:19:51,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:51,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:51,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:51,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:51,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:52,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 176 [2022-11-03 02:19:52,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2022-11-03 02:19:52,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 150 treesize of output 136 [2022-11-03 02:19:52,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 106 [2022-11-03 02:19:52,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:52,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:52,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:52,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:52,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 176 [2022-11-03 02:19:52,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2022-11-03 02:19:52,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 150 treesize of output 136 [2022-11-03 02:19:52,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 106 [2022-11-03 02:19:52,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:52,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:52,345 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:53,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1138#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:53,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:53,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:53,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-11-03 02:19:53,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958985509] [2022-11-03 02:19:53,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:53,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:19:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:19:53,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:19:53,254 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:54,590 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-11-03 02:19:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:19:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 02:19:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:54,592 INFO L225 Difference]: With dead ends: 62 [2022-11-03 02:19:54,592 INFO L226 Difference]: Without dead ends: 60 [2022-11-03 02:19:54,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=618, Invalid=3672, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:19:54,594 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 85 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:54,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 90 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 251 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-03 02:19:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-03 02:19:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2022-11-03 02:19:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-03 02:19:54,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2022-11-03 02:19:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:54,609 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-03 02:19:54,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-03 02:19:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:19:54,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:54,611 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:54,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:54,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:54,826 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:54,827 INFO L85 PathProgramCache]: Analyzing trace with hash -837476942, now seen corresponding path program 4 times [2022-11-03 02:19:54,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:54,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304150575] [2022-11-03 02:19:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:54,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:19:55,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:55,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304150575] [2022-11-03 02:19:55,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304150575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:55,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630253249] [2022-11-03 02:19:55,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:19:55,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:55,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:55,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:55,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:19:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:55,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:19:55,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:19:55,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:19:55,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630253249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:55,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323793991] [2022-11-03 02:19:55,710 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:19:55,710 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:55,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:55,711 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:55,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,755 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:19:55,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:19:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:19:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-11-03 02:19:55,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,034 INFO L356 Elim1Store]: treesize reduction 327, result has 6.3 percent of original size [2022-11-03 02:19:56,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 780 treesize of output 799 [2022-11-03 02:19:56,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,109 INFO L356 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-11-03 02:19:56,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 643 treesize of output 634 [2022-11-03 02:19:56,482 INFO L356 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-11-03 02:19:56,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 508 treesize of output 460 [2022-11-03 02:19:56,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 411 treesize of output 387 [2022-11-03 02:19:56,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 392 treesize of output 380 [2022-11-03 02:19:56,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:19:56,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:56,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:56,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:56,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:56,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:56,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:56,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 02:19:56,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:19:56,948 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:57,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1507#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:57,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:57,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:57,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-03 02:19:57,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894586717] [2022-11-03 02:19:57,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:57,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:19:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:19:57,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:19:57,585 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:57,847 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-11-03 02:19:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:19:57,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 02:19:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:57,848 INFO L225 Difference]: With dead ends: 50 [2022-11-03 02:19:57,848 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 02:19:57,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:19:57,849 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:57,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 51 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:19:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 02:19:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-03 02:19:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-03 02:19:57,862 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 25 [2022-11-03 02:19:57,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:57,862 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-03 02:19:57,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:57,863 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-03 02:19:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:19:57,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:57,864 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:57,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:58,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:19:58,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:58,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:58,087 INFO L85 PathProgramCache]: Analyzing trace with hash 254511252, now seen corresponding path program 5 times [2022-11-03 02:19:58,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:58,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998462556] [2022-11-03 02:19:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:58,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:59,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998462556] [2022-11-03 02:19:59,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998462556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:59,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074654760] [2022-11-03 02:19:59,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:19:59,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:59,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:59,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:59,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3d66de2-57aa-4daa-b255-6933ac1a9f70/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:19:59,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 02:19:59,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:59,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:19:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:59,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:59,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2022-11-03 02:19:59,578 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-03 02:19:59,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 21 treesize of output 25 [2022-11-03 02:19:59,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:19:59,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-03 02:19:59,675 INFO L356 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-03 02:19:59,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 23 treesize of output 37 [2022-11-03 02:19:59,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 42 treesize of output 30 [2022-11-03 02:19:59,719 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:19:59,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-03 02:19:59,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 76 [2022-11-03 02:19:59,889 INFO L356 Elim1Store]: treesize reduction 43, result has 56.6 percent of original size [2022-11-03 02:19:59,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 88 [2022-11-03 02:19:59,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:20:00,091 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:20:00,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 122 treesize of output 193 [2022-11-03 02:20:17,191 WARN L234 SmtUtils]: Spent 14.66s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:17,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 192 [2022-11-03 02:20:17,755 INFO L356 Elim1Store]: treesize reduction 135, result has 70.3 percent of original size [2022-11-03 02:20:17,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 163 treesize of output 415 [2022-11-03 02:21:13,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17129 treesize of output 15951