./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/revcpyswp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/revcpyswp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS --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 e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 --- 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-8393723 [2022-11-19 06:59:25,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:59:25,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:59:25,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:59:25,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:59:25,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:59:25,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:59:25,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:59:25,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:59:25,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:59:25,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:59:25,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:59:25,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:59:25,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:59:25,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:59:25,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:59:25,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:59:25,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:59:25,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:59:25,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:59:25,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:59:25,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:59:25,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:59:25,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:59:25,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:59:25,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:59:25,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:59:25,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:59:25,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:59:25,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:59:25,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:59:25,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:59:25,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:59:25,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:59:25,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:59:25,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:59:25,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:59:25,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:59:25,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:59:25,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:59:25,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:59:25,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:59:25,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:59:25,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:59:25,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:59:25,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:59:25,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:59:25,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:59:25,524 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:59:25,524 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:59:25,525 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:59:25,525 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:59:25,525 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:59:25,525 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:59:25,526 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:59:25,526 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:59:25,526 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:59:25,527 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:59:25,527 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:59:25,527 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:59:25,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:59:25,528 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:59:25,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:59:25,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:59:25,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:59:25,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:59:25,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:59:25,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:59:25,529 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:59:25,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:59:25,530 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:59:25,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:59:25,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:59:25,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:59:25,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:59:25,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:59:25,531 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:59:25,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:59:25,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:59:25,532 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:59:25,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:59:25,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:59:25,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:59:25,533 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_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 [2022-11-19 06:59:25,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:59:25,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:59:25,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:59:25,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:59:25,875 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:59:25,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-tiling/revcpyswp2.c [2022-11-19 06:59:25,967 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/data/c3cebccc4/f8db70b3e8744e24a1597148bccf6ca8/FLAG471ffd5dc [2022-11-19 06:59:26,503 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:59:26,504 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/sv-benchmarks/c/array-tiling/revcpyswp2.c [2022-11-19 06:59:26,515 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/data/c3cebccc4/f8db70b3e8744e24a1597148bccf6ca8/FLAG471ffd5dc [2022-11-19 06:59:26,855 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/data/c3cebccc4/f8db70b3e8744e24a1597148bccf6ca8 [2022-11-19 06:59:26,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:59:26,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:59:26,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:59:26,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:59:26,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:59:26,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:59:26" (1/1) ... [2022-11-19 06:59:26,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cbbc064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:26, skipping insertion in model container [2022-11-19 06:59:26,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:59:26" (1/1) ... [2022-11-19 06:59:26,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:59:26,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:59:27,134 WARN L234 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_376ad69c-c105-4a6e-b183-c85ce560cc4d/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2022-11-19 06:59:27,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:59:27,191 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:59:27,204 WARN L234 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_376ad69c-c105-4a6e-b183-c85ce560cc4d/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2022-11-19 06:59:27,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:59:27,234 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:59:27,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27 WrapperNode [2022-11-19 06:59:27,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:59:27,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:59:27,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:59:27,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:59:27,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,273 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2022-11-19 06:59:27,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:59:27,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:59:27,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:59:27,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:59:27,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,301 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:59:27,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:59:27,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:59:27,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:59:27,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (1/1) ... [2022-11-19 06:59:27,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:59:27,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:27,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:59:27,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:59:27,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:59:27,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:59:27,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:59:27,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:59:27,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:59:27,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:59:27,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:59:27,470 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:59:27,473 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:59:27,749 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:59:27,786 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:59:27,787 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-19 06:59:27,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:59:27 BoogieIcfgContainer [2022-11-19 06:59:27,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:59:27,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:59:27,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:59:27,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:59:27,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:59:26" (1/3) ... [2022-11-19 06:59:27,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be02e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:59:27, skipping insertion in model container [2022-11-19 06:59:27,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:27" (2/3) ... [2022-11-19 06:59:27,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be02e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:59:27, skipping insertion in model container [2022-11-19 06:59:27,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:59:27" (3/3) ... [2022-11-19 06:59:27,813 INFO L112 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2022-11-19 06:59:27,837 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:59:27,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:59:27,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:59:27,895 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;@3af6cfdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:59:27,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:59:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2022-11-19 06:59:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:59:27,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:27,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:27,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:27,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:27,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1725272608, now seen corresponding path program 1 times [2022-11-19 06:59:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:27,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404306393] [2022-11-19 06:59:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:28,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:28,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404306393] [2022-11-19 06:59:28,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404306393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:28,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:28,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:59:28,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109826739] [2022-11-19 06:59:28,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:28,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:28,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:28,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:59:28,466 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) 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) [2022-11-19 06:59:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:28,569 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-11-19 06:59:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:28,572 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 [2022-11-19 06:59:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:28,581 INFO L225 Difference]: With dead ends: 24 [2022-11-19 06:59:28,582 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 06:59:28,585 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 [2022-11-19 06:59:28,595 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:28,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 06:59:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 06:59:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2022-11-19 06:59:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-19 06:59:28,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2022-11-19 06:59:28,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:28,640 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-19 06:59:28,641 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) [2022-11-19 06:59:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-19 06:59:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:59:28,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:28,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:28,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:59:28,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash -442098293, now seen corresponding path program 1 times [2022-11-19 06:59:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:28,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288553764] [2022-11-19 06:59:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:59:28,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:28,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288553764] [2022-11-19 06:59:28,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288553764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:28,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:28,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:59:28,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848284228] [2022-11-19 06:59:28,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:28,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:59:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:59:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:59:28,768 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:28,820 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-11-19 06:59:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:59:28,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 06:59:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:28,823 INFO L225 Difference]: With dead ends: 27 [2022-11-19 06:59:28,823 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 06:59:28,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:59:28,830 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:28,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 7 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:59:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 06:59:28,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-11-19 06:59:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2022-11-19 06:59:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-19 06:59:28,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-11-19 06:59:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:28,842 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-19 06:59:28,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-19 06:59:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:59:28,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:28,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:28,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:59:28,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1461741124, now seen corresponding path program 1 times [2022-11-19 06:59:28,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:28,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492834812] [2022-11-19 06:59:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:28,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:59:29,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:29,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492834812] [2022-11-19 06:59:29,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492834812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:29,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67550951] [2022-11-19 06:59:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:29,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:29,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:29,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:29,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:59:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:59:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:59:29,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:59:29,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67550951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733962370] [2022-11-19 06:59:29,407 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 06:59:29,407 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:29,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:29,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:29,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:29,981 INFO L321 Elim1Store]: treesize reduction 402, result has 16.4 percent of original size [2022-11-19 06:59:29,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 80 treesize of output 137 [2022-11-19 06:59:30,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 25 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 61 [2022-11-19 06:59:30,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 06:59:30,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:30,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:30,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:30,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:30,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:30,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:30,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:30,726 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 06:59:30,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 574 treesize of output 542 [2022-11-19 06:59:31,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:31,081 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:59:31,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:59:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:31,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:31,402 INFO L321 Elim1Store]: treesize reduction 447, result has 23.3 percent of original size [2022-11-19 06:59:31,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 186 treesize of output 225 [2022-11-19 06:59:31,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:31,892 INFO L321 Elim1Store]: treesize reduction 39, result has 48.7 percent of original size [2022-11-19 06:59:31,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 187 treesize of output 188 [2022-11-19 06:59:31,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:31,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:31,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 56 [2022-11-19 06:59:31,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:31,970 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2022-11-19 06:59:32,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 96 [2022-11-19 06:59:32,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 81 [2022-11-19 06:59:32,059 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:32,081 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:32,092 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:32,104 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:32,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,571 INFO L321 Elim1Store]: treesize reduction 447, result has 23.3 percent of original size [2022-11-19 06:59:32,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 186 treesize of output 225 [2022-11-19 06:59:32,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,838 INFO L321 Elim1Store]: treesize reduction 39, result has 48.7 percent of original size [2022-11-19 06:59:32,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 187 treesize of output 188 [2022-11-19 06:59:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,887 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2022-11-19 06:59:32,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 56 [2022-11-19 06:59:32,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,963 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2022-11-19 06:59:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:32,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 111 [2022-11-19 06:59:33,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:33,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 106 [2022-11-19 06:59:33,106 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:33,131 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:33,143 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:33,177 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:33,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:33,460 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:59:33,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 18 [2022-11-19 06:59:33,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:33,512 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:59:33,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 28 [2022-11-19 06:59:33,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:33,551 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:59:33,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 28 [2022-11-19 06:59:33,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:33,594 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:59:33,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 136 treesize of output 94 [2022-11-19 06:59:33,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:33,660 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:59:33,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 28 [2022-11-19 06:59:33,719 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:34,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '220#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (- 4)) (- 4))) |ULTIMATE.start_main_#t~mem23#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem22#1|) (<= 0 |ULTIMATE.start_main_~a_copy~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~b_copy~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a_copy~0#1.offset| 0) (<= |ULTIMATE.start_main_~b_copy~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:34,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:34,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:34,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 06:59:34,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588726856] [2022-11-19 06:59:34,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:34,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:59:34,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:34,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:59:34,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:59:34,248 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2022-11-19 06:59:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:34,306 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-19 06:59:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:59:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) Word has length 13 [2022-11-19 06:59:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:34,308 INFO L225 Difference]: With dead ends: 27 [2022-11-19 06:59:34,308 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 06:59:34,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:59:34,310 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:34,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:59:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 06:59:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 06:59:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-19 06:59:34,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 13 [2022-11-19 06:59:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:34,315 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-19 06:59:34,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2022-11-19 06:59:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-19 06:59:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 06:59:34,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:34,316 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:34,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:59:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:34,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash -346719257, now seen corresponding path program 2 times [2022-11-19 06:59:34,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:34,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992107854] [2022-11-19 06:59:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:59:34,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:34,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992107854] [2022-11-19 06:59:34,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992107854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:34,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967440731] [2022-11-19 06:59:34,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:59:34,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:34,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:34,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:34,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:59:34,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:59:34,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:34,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:59:34,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:59:34,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:59:34,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967440731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:34,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525670648] [2022-11-19 06:59:34,821 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 06:59:34,821 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:34,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:34,822 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:34,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:35,142 INFO L321 Elim1Store]: treesize reduction 402, result has 16.4 percent of original size [2022-11-19 06:59:35,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 80 treesize of output 137 [2022-11-19 06:59:35,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 25 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 61 [2022-11-19 06:59:35,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:59:35,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:35,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:35,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:35,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:35,563 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:59:35,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 554 treesize of output 544 [2022-11-19 06:59:36,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:36,402 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:59:36,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:59:36,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:36,635 INFO L321 Elim1Store]: treesize reduction 370, result has 22.8 percent of original size [2022-11-19 06:59:36,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 138 treesize of output 182 [2022-11-19 06:59:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:37,007 INFO L321 Elim1Store]: treesize reduction 39, result has 48.7 percent of original size [2022-11-19 06:59:37,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 137 treesize of output 138 [2022-11-19 06:59:37,056 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-19 06:59:37,076 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2022-11-19 06:59:37,093 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,104 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:37,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 53 [2022-11-19 06:59:37,146 WARN L193 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,152 WARN L193 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:37,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 63 [2022-11-19 06:59:37,203 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,223 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,246 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,256 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:37,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:37,615 INFO L321 Elim1Store]: treesize reduction 447, result has 23.3 percent of original size [2022-11-19 06:59:37,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 186 treesize of output 225 [2022-11-19 06:59:37,757 INFO L321 Elim1Store]: treesize reduction 74, result has 46.8 percent of original size [2022-11-19 06:59:37,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 199 treesize of output 224 [2022-11-19 06:59:37,787 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,832 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 06:59:37,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-19 06:59:37,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:37,874 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 12 [2022-11-19 06:59:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:37,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:37,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 95 [2022-11-19 06:59:37,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:37,979 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 38 [2022-11-19 06:59:38,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:59:38,088 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 55 [2022-11-19 06:59:38,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 95 [2022-11-19 06:59:38,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,284 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-19 06:59:38,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 371 treesize of output 209 [2022-11-19 06:59:38,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 174 [2022-11-19 06:59:38,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,446 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-19 06:59:38,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 64 [2022-11-19 06:59:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,475 INFO L350 Elim1Store]: Elim1 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 124 treesize of output 72 [2022-11-19 06:59:38,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 64 [2022-11-19 06:59:38,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 371 treesize of output 209 [2022-11-19 06:59:38,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 174 [2022-11-19 06:59:38,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,719 INFO L350 Elim1Store]: Elim1 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 124 treesize of output 72 [2022-11-19 06:59:38,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 64 [2022-11-19 06:59:38,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:38,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 64 [2022-11-19 06:59:39,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:39,686 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:59:39,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 18 [2022-11-19 06:59:39,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:39,721 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:59:39,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 28 [2022-11-19 06:59:39,745 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:59:39,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 18 [2022-11-19 06:59:39,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:39,826 INFO L321 Elim1Store]: treesize reduction 101, result has 26.3 percent of original size [2022-11-19 06:59:39,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 105 [2022-11-19 06:59:39,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:39,891 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 06:59:39,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 28 [2022-11-19 06:59:39,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:40,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '381#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (- 4)) (- 4))) |ULTIMATE.start_main_#t~mem23#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem22#1|) (<= 0 |ULTIMATE.start_main_~a_copy~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~b_copy~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a_copy~0#1.offset| 0) (<= |ULTIMATE.start_main_~b_copy~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:40,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:40,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:40,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-19 06:59:40,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616237764] [2022-11-19 06:59:40,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:59:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:59:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:59:40,435 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2022-11-19 06:59:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:40,535 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-11-19 06:59:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:59:40,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) Word has length 14 [2022-11-19 06:59:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:40,539 INFO L225 Difference]: With dead ends: 38 [2022-11-19 06:59:40,539 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 06:59:40,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:59:40,543 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:40,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 10 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 06:59:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-19 06:59:40,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2022-11-19 06:59:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-19 06:59:40,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2022-11-19 06:59:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:40,554 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-19 06:59:40,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2022-11-19 06:59:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-19 06:59:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 06:59:40,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:40,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:40,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:40,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:40,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1872217504, now seen corresponding path program 3 times [2022-11-19 06:59:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:40,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322361889] [2022-11-19 06:59:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:43,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:43,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322361889] [2022-11-19 06:59:43,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322361889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:43,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524823033] [2022-11-19 06:59:43,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:59:43,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:43,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:43,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:43,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_376ad69c-c105-4a6e-b183-c85ce560cc4d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:59:43,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:59:43,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-19 06:59:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:43,995 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:59:43,995 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2022-11-19 06:59:44,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 26 [2022-11-19 06:59:44,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-19 06:59:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,222 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 06:59:44,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 55 [2022-11-19 06:59:44,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-19 06:59:44,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2022-11-19 06:59:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,452 INFO L350 Elim1Store]: Elim1 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 46 treesize of output 36 [2022-11-19 06:59:44,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2022-11-19 06:59:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 45 [2022-11-19 06:59:44,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2022-11-19 06:59:44,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 35 [2022-11-19 06:59:44,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-19 06:59:44,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:44,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2022-11-19 06:59:44,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-19 06:59:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:59:44,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:44,904 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 Int) (v_ArrVal_367 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_366)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_367))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0)))))) is different from false [2022-11-19 06:59:45,122 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 Int) (|v_ULTIMATE.start_main_~i~0#1_122| Int) (v_ArrVal_365 (Array Int Int)) (v_ArrVal_367 (Array Int Int))) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_122|)) (let ((.cse0 (store (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_365))) (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_122| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_366))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_367))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2022-11-19 06:59:45,142 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 Int) (|v_ULTIMATE.start_main_~i~0#1_122| Int) (v_ArrVal_365 (Array Int Int)) (v_ArrVal_367 (Array Int Int))) (or (let ((.cse0 (store (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_365))) (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_122| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_366))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_367))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))))) (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_122|)))) is different from false [2022-11-19 07:00:04,595 INFO L321 Elim1Store]: treesize reduction 51, result has 36.3 percent of original size [2022-11-19 07:00:04,596 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 18830 treesize of output 7339