./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s1if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s1if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7 --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 1a3387bc5e2da462b89ff029159e07dcc81e24b9a3389e54a743d70d22e0e9eb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:09:19,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:09:19,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:09:19,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:09:19,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:09:19,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:09:19,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:09:19,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:09:19,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:09:19,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:09:19,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:09:19,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:09:19,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:09:19,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:09:19,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:09:19,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:09:19,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:09:19,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:09:19,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:09:19,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:09:19,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:09:19,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:09:19,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:09:19,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:09:19,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:09:19,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:09:19,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:09:19,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:09:19,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:09:19,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:09:19,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:09:19,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:09:19,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:09:19,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:09:19,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:09:19,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:09:19,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:09:19,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:09:19,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:09:19,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:09:19,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:09:19,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:09:19,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:09:19,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:09:19,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:09:19,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:09:19,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:09:19,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:09:19,338 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:09:19,339 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:09:19,339 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:09:19,339 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:09:19,340 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:09:19,340 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:09:19,340 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:09:19,341 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:09:19,341 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:09:19,341 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:09:19,342 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:09:19,342 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:09:19,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:09:19,343 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:09:19,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:09:19,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:09:19,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:09:19,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:09:19,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:09:19,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:09:19,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:09:19,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:09:19,346 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:09:19,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:09:19,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:09:19,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:09:19,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:09:19,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:09:19,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:09:19,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:09:19,349 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:09:19,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:09:19,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:09:19,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:09:19,350 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:09:19,351 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a3387bc5e2da462b89ff029159e07dcc81e24b9a3389e54a743d70d22e0e9eb [2021-11-25 20:09:19,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:09:19,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:09:19,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:09:19,666 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:09:19,667 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:09:19,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/s1if.c [2021-11-25 20:09:19,737 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/data/b9ca31ccd/a1c411f6451d40818e39a5dd74c74003/FLAG7aec7fc5a [2021-11-25 20:09:20,233 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:09:20,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/sv-benchmarks/c/array-fpi/s1if.c [2021-11-25 20:09:20,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/data/b9ca31ccd/a1c411f6451d40818e39a5dd74c74003/FLAG7aec7fc5a [2021-11-25 20:09:20,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/data/b9ca31ccd/a1c411f6451d40818e39a5dd74c74003 [2021-11-25 20:09:20,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:09:20,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:09:20,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:09:20,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:09:20,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:09:20,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:20,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265043c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20, skipping insertion in model container [2021-11-25 20:09:20,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:20,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:09:20,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:09:20,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-25 20:09:20,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:09:20,868 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:09:20,886 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-25 20:09:20,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:09:20,926 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:09:20,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20 WrapperNode [2021-11-25 20:09:20,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:09:20,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:09:20,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:09:20,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:09:20,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:20,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:20,963 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-11-25 20:09:20,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:09:20,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:09:20,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:09:20,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:09:20,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:20,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:20,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:20,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:20,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:21,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:21,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:21,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:09:21,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:09:21,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:09:21,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:09:21,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (1/1) ... [2021-11-25 20:09:21,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:09:21,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:21,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:09:21,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:09:21,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:09:21,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:09:21,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:09:21,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:09:21,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:09:21,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:09:21,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:09:21,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:09:21,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:09:21,162 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:09:21,163 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:09:21,305 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:09:21,358 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:09:21,358 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:09:21,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:09:21 BoogieIcfgContainer [2021-11-25 20:09:21,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:09:21,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:09:21,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:09:21,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:09:21,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:09:20" (1/3) ... [2021-11-25 20:09:21,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44433c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:09:21, skipping insertion in model container [2021-11-25 20:09:21,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:20" (2/3) ... [2021-11-25 20:09:21,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44433c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:09:21, skipping insertion in model container [2021-11-25 20:09:21,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:09:21" (3/3) ... [2021-11-25 20:09:21,369 INFO L111 eAbstractionObserver]: Analyzing ICFG s1if.c [2021-11-25 20:09:21,374 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:09:21,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:09:21,423 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:09:21,431 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:09:21,431 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:09:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:09:21,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:21,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:09:21,451 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-11-25 20:09:21,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:21,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555024687] [2021-11-25 20:09:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:21,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:21,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:21,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555024687] [2021-11-25 20:09:21,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555024687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:21,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:21,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:09:21,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986125327] [2021-11-25 20:09:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:21,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:09:21,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:09:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:09:21,716 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:21,757 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-25 20:09:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:09:21,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 20:09:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:21,768 INFO L225 Difference]: With dead ends: 18 [2021-11-25 20:09:21,768 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 20:09:21,771 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:09:21,775 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:21,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 20:09:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 20:09:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 20:09:21,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-25 20:09:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:21,810 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 20:09:21,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 20:09:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:09:21,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:21,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:21,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:09:21,812 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:21,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-11-25 20:09:21,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:21,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128818092] [2021-11-25 20:09:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:21,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:09:21,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:21,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128818092] [2021-11-25 20:09:21,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128818092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:21,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:21,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:09:21,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902569884] [2021-11-25 20:09:21,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:21,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:09:21,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:09:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:09:21,930 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:21,970 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-25 20:09:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:09:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:09:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:21,988 INFO L225 Difference]: With dead ends: 12 [2021-11-25 20:09:21,988 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 20:09:21,988 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:09:21,990 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:21,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 20:09:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 20:09:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2021-11-25 20:09:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 20:09:22,007 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-25 20:09:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:22,007 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 20:09:22,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 20:09:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:09:22,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:22,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:22,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:09:22,011 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-11-25 20:09:22,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:22,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682841381] [2021-11-25 20:09:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:22,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:22,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:22,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432491837] [2021-11-25 20:09:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:22,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:22,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:22,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:22,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:09:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 20:09:22,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:22,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:09:22,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:09:22,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 20:09:22,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 20:09:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-11-25 20:09:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:22,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:22,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:09:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:23,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:23,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682841381] [2021-11-25 20:09:23,011 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432491837] [2021-11-25 20:09:23,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432491837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120533194] [2021-11-25 20:09:23,032 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:23,032 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:23,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:23,042 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:23,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:23,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,182 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:09:23,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:09:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,301 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:23,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:23,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:09:23,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-25 20:09:23,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:23,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:23,765 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-25 20:09:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 430 treesize of output 419 [2021-11-25 20:09:23,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:24,008 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:24,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:09:24,099 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:24,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:09:24,206 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:24,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:24,272 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:24,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:24,391 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:24,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:09:24,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:24,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:24,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-25 20:09:24,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46225004] [2021-11-25 20:09:24,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:24,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:09:24,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:24,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:09:24,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:09:24,792 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:24,848 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-25 20:09:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:09:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 20:09:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:24,851 INFO L225 Difference]: With dead ends: 15 [2021-11-25 20:09:24,851 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 20:09:24,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:09:24,855 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:24,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-25 20:09:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 20:09:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-25 20:09:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-25 20:09:24,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-25 20:09:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:24,868 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-25 20:09:24,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-25 20:09:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:09:24,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:24,870 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:24,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:25,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:25,095 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2021-11-25 20:09:25,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:25,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39712678] [2021-11-25 20:09:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:25,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:25,115 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:25,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719973280] [2021-11-25 20:09:25,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:09:25,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:25,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:25,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:25,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:09:25,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:09:25,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:09:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:09:25,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:25,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:25,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39712678] [2021-11-25 20:09:25,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:25,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719973280] [2021-11-25 20:09:25,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719973280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:25,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182075349] [2021-11-25 20:09:25,278 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:25,286 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:25,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:25,287 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:25,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,376 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:09:25,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:09:25,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,468 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:25,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:09:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:09:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:25,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:25,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:25,766 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:09:25,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:09:25,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:26,013 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:26,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:09:26,070 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:09:26,155 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:26,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:26,213 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:26,337 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:26,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '236#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:09:26,721 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:26,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:26,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 20:09:26,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734791395] [2021-11-25 20:09:26,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:26,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:09:26,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:26,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:09:26,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:09:26,724 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:26,804 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-25 20:09:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:09:26,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 20:09:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:26,806 INFO L225 Difference]: With dead ends: 20 [2021-11-25 20:09:26,806 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 20:09:26,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:09:26,807 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:26,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 20:09:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-11-25 20:09:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-11-25 20:09:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 20:09:26,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-11-25 20:09:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:26,811 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 20:09:26,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 20:09:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:09:26,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:26,812 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:26,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:27,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:27,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:27,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2021-11-25 20:09:27,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:27,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739693255] [2021-11-25 20:09:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:27,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:27,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:27,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271972414] [2021-11-25 20:09:27,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:09:27,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:27,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:27,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:27,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:09:27,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:09:27,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:09:27,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:09:27,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:27,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:27,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:27,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739693255] [2021-11-25 20:09:27,195 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271972414] [2021-11-25 20:09:27,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271972414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406268026] [2021-11-25 20:09:27,198 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:27,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:27,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:27,199 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:27,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:27,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:27,256 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:09:27,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:09:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:27,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:27,335 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:09:27,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:09:27,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:27,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:27,435 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:27,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:27,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:27,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-25 20:09:27,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:27,623 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:27,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:09:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:27,670 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:09:27,794 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:27,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:27,854 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:27,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:27,945 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:28,236 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '347#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:09:28,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:28,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:28,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 20:09:28,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771903963] [2021-11-25 20:09:28,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:28,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:09:28,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:09:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:09:28,238 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:28,320 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-25 20:09:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:09:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 20:09:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:28,321 INFO L225 Difference]: With dead ends: 14 [2021-11-25 20:09:28,321 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 20:09:28,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:09:28,322 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:28,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 20:09:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 20:09:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 20:09:28,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-25 20:09:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:28,327 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 20:09:28,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 20:09:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:09:28,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:28,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:28,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:28,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:28,541 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2021-11-25 20:09:28,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:28,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337591927] [2021-11-25 20:09:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:28,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:28,559 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:28,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660798649] [2021-11-25 20:09:28,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:09:28,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:28,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:28,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:28,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:09:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 20:09:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:28,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:09:28,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:09:28,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-25 20:09:28,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:28,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:09:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:28,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-25 20:09:28,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-11-25 20:09:28,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-11-25 20:09:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:29,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:29,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:09:29,275 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5)))) (let ((.cse0 (= .cse1 1))) (and (or .cse0 (and (forall ((v_ArrVal_162 (Array Int Int))) (= (+ (select v_ArrVal_162 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_162) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4))) c_~N~0)) (forall ((v_ArrVal_162 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_162) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1)))) (or (not .cse0) (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5 4)))) (and (= c_~N~0 (+ .cse1 .cse2 .cse3)) (= .cse3 1)))))))))) is different from false [2021-11-25 20:09:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 20:09:29,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337591927] [2021-11-25 20:09:29,736 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660798649] [2021-11-25 20:09:29,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660798649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401159521] [2021-11-25 20:09:29,738 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:29,738 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:29,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:29,738 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:29,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:29,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:29,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:29,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:29,853 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:29,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:29,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:29,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:09:29,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:29,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:09:29,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:29,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:09:30,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:30,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:30,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:30,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:30,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:30,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:30,177 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:09:30,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:09:30,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:30,341 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:30,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:09:30,412 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:30,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:09:30,499 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:30,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:30,556 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:30,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:30,648 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:31,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '465#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:09:31,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:31,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:31,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-25 20:09:31,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675354479] [2021-11-25 20:09:31,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:31,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:09:31,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:31,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:09:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=260, Unknown=1, NotChecked=32, Total=342 [2021-11-25 20:09:31,113 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:31,339 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-25 20:09:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:09:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 20:09:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:31,340 INFO L225 Difference]: With dead ends: 18 [2021-11-25 20:09:31,340 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:09:31,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=323, Unknown=1, NotChecked=36, Total=420 [2021-11-25 20:09:31,342 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:31,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-11-25 20:09:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:09:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-25 20:09:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-25 20:09:31,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-25 20:09:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:31,347 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-25 20:09:31,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-25 20:09:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:09:31,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:31,347 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:31,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:31,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:09:31,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1260736258, now seen corresponding path program 5 times [2021-11-25 20:09:31,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:31,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118317330] [2021-11-25 20:09:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:31,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:31,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:31,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651411202] [2021-11-25 20:09:31,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:09:31,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:31,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:31,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:09:31,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:09:31,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:09:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:09:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:31,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:31,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118317330] [2021-11-25 20:09:31,795 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651411202] [2021-11-25 20:09:31,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651411202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100532784] [2021-11-25 20:09:31,799 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:31,800 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:31,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:31,801 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:31,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:31,847 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:09:31,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:09:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:31,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:31,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:31,935 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:31,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:31,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:09:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-25 20:09:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:32,198 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-25 20:09:32,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 430 treesize of output 419 [2021-11-25 20:09:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:32,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:32,340 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:09:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-25 20:09:32,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:32,401 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:09:32,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-25 20:09:32,466 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:32,565 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:32,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:32,591 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:32,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '594#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:09:32,812 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:32,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:32,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-25 20:09:32,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001928028] [2021-11-25 20:09:32,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:32,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:09:32,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:32,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:09:32,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:09:32,814 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:32,895 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-25 20:09:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:09:32,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 20:09:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:32,896 INFO L225 Difference]: With dead ends: 23 [2021-11-25 20:09:32,896 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 20:09:32,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:09:32,901 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:32,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 20:09:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-11-25 20:09:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:32,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-25 20:09:32,908 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-11-25 20:09:32,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:32,909 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-25 20:09:32,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-25 20:09:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:09:32,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:32,912 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:32,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:33,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:33,127 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash 973526812, now seen corresponding path program 6 times [2021-11-25 20:09:33,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:33,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983883994] [2021-11-25 20:09:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:33,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:33,142 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:33,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878531584] [2021-11-25 20:09:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:09:33,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:33,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:33,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:33,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:09:33,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:09:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:09:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:09:33,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:33,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:33,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983883994] [2021-11-25 20:09:33,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878531584] [2021-11-25 20:09:33,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878531584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694076897] [2021-11-25 20:09:33,344 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:33,344 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:33,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:33,345 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:33,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:33,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,453 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:33,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:09:33,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:09:33,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:09:33,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:33,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:33,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:33,721 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:09:33,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:09:33,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:33,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:33,857 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:09:33,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-25 20:09:33,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:33,891 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:09:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-25 20:09:33,982 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:33,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:34,061 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:34,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:34,087 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:34,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '732#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:09:34,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:34,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:34,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 20:09:34,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408246588] [2021-11-25 20:09:34,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:34,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:09:34,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:09:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:09:34,318 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:34,412 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-25 20:09:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:09:34,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 20:09:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:34,413 INFO L225 Difference]: With dead ends: 16 [2021-11-25 20:09:34,413 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 20:09:34,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:09:34,415 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:34,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:09:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 20:09:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 20:09:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 20:09:34,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-25 20:09:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:34,419 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 20:09:34,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 20:09:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:09:34,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:34,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:34,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:34,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:34,631 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:34,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash 114668683, now seen corresponding path program 7 times [2021-11-25 20:09:34,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:34,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184402198] [2021-11-25 20:09:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:34,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:34,647 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:34,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570611156] [2021-11-25 20:09:34,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:09:34,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:34,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:34,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:34,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:09:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:34,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-25 20:09:34,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:34,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:09:34,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:09:34,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-25 20:09:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:34,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 20:09:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:34,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 42 [2021-11-25 20:09:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:34,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:34,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-25 20:09:35,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 103 [2021-11-25 20:09:35,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2021-11-25 20:09:35,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2021-11-25 20:09:35,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 56 treesize of output 45 [2021-11-25 20:09:35,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2021-11-25 20:09:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:35,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:35,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:09:35,470 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6))) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse4 (= .cse1 1))) (let ((.cse0 (not .cse4)) (.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 4)))) (and (or .cse0 (= c_~N~0 (+ .cse1 .cse2 .cse3))) (or .cse4 (forall ((v_ArrVal_319 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_319) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1))) (or .cse4 (forall ((v_ArrVal_319 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_319) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) (select v_ArrVal_319 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) c_~N~0))) (or .cse0 (= .cse3 1))))))) is different from false [2021-11-25 20:09:35,781 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse6 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10)))) (let ((.cse0 (= .cse6 1)) (.cse5 (forall ((v_ArrVal_319 (Array Int Int))) (= (+ (select v_ArrVal_319 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_319) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4)))) c_~N~0))) (.cse2 (forall ((v_ArrVal_319 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_319) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1)))) (and (or (not .cse0) (let ((.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10 4)))) (let ((.cse1 (= .cse8 1))) (let ((.cse3 (not .cse1)) (.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse10)))) (and (or .cse1 .cse2) (or .cse3 (= .cse4 1)) (or .cse5 .cse1) (or .cse3 (= c_~N~0 (+ .cse6 .cse4 .cse7 .cse8)))))))))) (or .cse0 (let ((.cse11 (forall ((v_ArrVal_315 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1)))) (and (or .cse5 .cse11) (forall ((v_ArrVal_315 (Array Int Int))) (let ((.cse13 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse12 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse13 4)))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_315 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ (select v_ArrVal_315 |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse13)) 1) (not (= .cse12 1)))))) (or .cse11 .cse2) (forall ((v_ArrVal_315 (Array Int Int))) (let ((.cse16 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse15 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_315) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse16 4)))) (or (= c_~N~0 (let ((.cse14 (select v_ArrVal_315 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse14 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_315 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse16)) .cse15))) (not (= .cse15 1))))))))))))) is different from false [2021-11-25 20:09:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 20:09:41,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184402198] [2021-11-25 20:09:41,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570611156] [2021-11-25 20:09:41,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570611156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1198511988] [2021-11-25 20:09:41,313 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:41,313 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:41,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:41,314 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:41,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:41,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:41,442 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:09:41,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:09:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:41,486 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:09:41,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:09:41,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:41,678 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:41,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:41,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:41,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-25 20:09:41,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:41,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:41,864 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:41,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:09:41,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:41,946 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:41,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:09:42,083 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:42,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:42,176 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:42,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:42,255 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:42,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '876#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:09:42,919 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:42,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:42,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-25 20:09:42,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794540791] [2021-11-25 20:09:42,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:42,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 20:09:42,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:42,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 20:09:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=366, Unknown=2, NotChecked=78, Total=506 [2021-11-25 20:09:42,921 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:43,742 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-25 20:09:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:09:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 20:09:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:43,743 INFO L225 Difference]: With dead ends: 21 [2021-11-25 20:09:43,743 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:09:43,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=71, Invalid=441, Unknown=2, NotChecked=86, Total=600 [2021-11-25 20:09:43,744 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:43,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 31 Unchecked, 0.4s Time] [2021-11-25 20:09:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:09:43,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-25 20:09:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 20:09:43,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-25 20:09:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:43,750 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 20:09:43,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 20:09:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:09:43,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:43,751 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:43,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:43,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:43,979 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash -740129540, now seen corresponding path program 8 times [2021-11-25 20:09:43,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:43,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234887017] [2021-11-25 20:09:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:43,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:43,995 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:43,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929113764] [2021-11-25 20:09:43,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:09:43,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:43,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:44,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:09:44,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:09:44,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:09:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:09:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:44,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:44,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:44,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234887017] [2021-11-25 20:09:44,364 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:44,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929113764] [2021-11-25 20:09:44,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929113764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:44,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617248438] [2021-11-25 20:09:44,366 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:44,366 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:44,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:44,366 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:44,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,521 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:44,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:44,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:09:44,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:09:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:09:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:44,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:44,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:44,856 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:09:44,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:09:44,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:45,030 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:45,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:09:45,090 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:45,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:09:45,243 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:45,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:45,411 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:45,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:45,458 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:46,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1031#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:09:46,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:46,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:46,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-25 20:09:46,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010874421] [2021-11-25 20:09:46,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:46,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:09:46,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:09:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:09:46,185 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-11-25 20:09:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:46,384 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-25 20:09:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:09:46,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 [2021-11-25 20:09:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:46,385 INFO L225 Difference]: With dead ends: 26 [2021-11-25 20:09:46,385 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:09:46,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:09:46,386 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:46,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:09:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:09:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-25 20:09:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:09:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-25 20:09:46,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2021-11-25 20:09:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:46,392 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-25 20:09:46,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-11-25 20:09:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-25 20:09:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:09:46,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:46,392 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:46,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:46,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:46,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:46,595 INFO L85 PathProgramCache]: Analyzing trace with hash -197451106, now seen corresponding path program 9 times [2021-11-25 20:09:46,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:46,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513957873] [2021-11-25 20:09:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:46,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:46,613 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:46,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741097241] [2021-11-25 20:09:46,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:09:46,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:46,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:46,627 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:46,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:09:46,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:09:46,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:09:46,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:09:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:46,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:47,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:47,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513957873] [2021-11-25 20:09:47,106 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:47,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741097241] [2021-11-25 20:09:47,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741097241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:47,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [862339847] [2021-11-25 20:09:47,108 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:09:47,108 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:47,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:47,109 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:47,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:47,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:47,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:47,258 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:09:47,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:09:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:47,302 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:09:47,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:09:47,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:47,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:47,461 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:09:47,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:09:47,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:47,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-25 20:09:47,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:09:47,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:47,662 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:47,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:09:47,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:09:47,764 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:09:47,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:09:47,897 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:47,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:09:48,038 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:09:48,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:09:48,065 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:09:48,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1196#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 20:09:48,621 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:09:48,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:48,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 20:09:48,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219658266] [2021-11-25 20:09:48,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:48,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:09:48,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:09:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:09:48,623 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-11-25 20:09:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:48,872 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-25 20:09:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:09:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 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 [2021-11-25 20:09:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:48,877 INFO L225 Difference]: With dead ends: 18 [2021-11-25 20:09:48,877 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:09:48,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:09:48,879 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:48,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:09:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:09:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 20:09:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2021-11-25 20:09:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 20:09:48,883 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-11-25 20:09:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:48,884 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 20:09:48,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-11-25 20:09:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 20:09:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 20:09:48,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:48,885 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 20:09:48,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:49,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:49,085 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:49,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1825908407, now seen corresponding path program 10 times [2021-11-25 20:09:49,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:49,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308710023] [2021-11-25 20:09:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:49,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:49,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:49,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483880027] [2021-11-25 20:09:49,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:09:49,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:49,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:49,102 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:49,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:09:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:49,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 20:09:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:49,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:09:49,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:09:49,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 20:09:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:09:49,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 48 [2021-11-25 20:09:49,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:09:49,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-25 20:09:49,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 108 [2021-11-25 20:09:49,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-25 20:09:49,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 20:09:49,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 115 [2021-11-25 20:09:49,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2021-11-25 20:09:50,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 20:09:50,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 124 [2021-11-25 20:09:50,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 42 [2021-11-25 20:09:50,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 20:09:50,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-11-25 20:09:50,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 40 [2021-11-25 20:09:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:09:50,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:50,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:09:50,938 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5)))) (let ((.cse0 (= .cse1 1))) (and (or .cse0 (and (forall ((v_ArrVal_515 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1)) (forall ((v_ArrVal_515 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) (select v_ArrVal_515 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) c_~N~0)))) (or (not .cse0) (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5 4)))) (and (= c_~N~0 (+ .cse1 .cse2 .cse3)) (= .cse3 1)))))))))) is different from false [2021-11-25 20:09:52,438 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse8 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse12)))) (let ((.cse0 (= .cse8 1)) (.cse5 (and (forall ((v_ArrVal_515 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1)) (forall ((v_ArrVal_515 (Array Int Int))) (= (+ (select v_ArrVal_515 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4)))) c_~N~0))))) (and (or .cse0 (and (forall ((v_ArrVal_513 (Array Int Int))) (let ((.cse4 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4 4)))) (or (not (= .cse1 1)) (let ((.cse2 (select v_ArrVal_513 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_513 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse4)))) (and (= (+ .cse1 .cse2 .cse3) c_~N~0) (= .cse3 1)))))))) (or .cse5 (forall ((v_ArrVal_513 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1))))) (or (not .cse0) (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse9 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse12 4)))) (let ((.cse6 (= .cse10 1))) (and (or .cse5 .cse6) (or (let ((.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse12)))) (and (= .cse7 1) (= c_~N~0 (+ .cse8 .cse7 .cse9 .cse10)))) (not .cse6)))))))))))) is different from false [2021-11-25 20:09:55,551 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse16 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse17 (and (forall ((v_ArrVal_515 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1)) (forall ((v_ArrVal_515 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (select v_ArrVal_515 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) c_~N~0)))) (.cse10 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse16)))) (let ((.cse0 (= .cse10 1)) (.cse1 (and (forall ((v_ArrVal_513 (Array Int Int))) (let ((.cse21 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse19 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse21)))) (or (let ((.cse20 (select v_ArrVal_513 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse18 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_513 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse20))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse21)))) (and (= .cse18 1) (= (+ .cse18 .cse19 .cse20) c_~N~0)))) (not (= .cse19 1)))))) (or .cse17 (forall ((v_ArrVal_513 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1)))))) (and (or .cse0 (and (or .cse1 (forall ((v_ArrVal_510 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_510) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1))) (forall ((v_ArrVal_510 (Array Int Int))) (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_510) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse7 4)))) (or (let ((.cse5 (select v_ArrVal_510 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_510 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse7)))) (let ((.cse2 (= .cse6 1))) (and (or .cse2 (and (forall ((v_ArrVal_515 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1)) (forall ((v_ArrVal_515 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (select v_ArrVal_515 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) c_~N~0)))) (or (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_510 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse7)))) (and (= .cse3 1) (= (+ .cse4 .cse3 .cse5 .cse6) c_~N~0))) (not .cse2)))))) (not (= .cse4 1)))))))) (or (not .cse0) (let ((.cse15 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse13 (select .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse14 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse13))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse16 4)))) (let ((.cse8 (= .cse14 1))) (and (or (not .cse8) (let ((.cse12 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse13 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse16)))) (let ((.cse9 (= .cse12 1))) (and (or (not .cse9) (let ((.cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse10 .cse12 .cse13 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse16)))) (and (= (+ .cse10 .cse11 .cse12 .cse13 .cse14) c_~N~0) (= .cse11 1)))) (or .cse17 .cse9))))) (or .cse8 .cse1))))))))))) is different from false [2021-11-25 20:10:30,921 WARN L227 SmtUtils]: Spent 34.42s on a formula simplification. DAG size of input: 117 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:10:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-25 20:10:35,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:35,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308710023] [2021-11-25 20:10:35,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:10:35,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483880027] [2021-11-25 20:10:35,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483880027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:35,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812864479] [2021-11-25 20:10:35,049 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:10:35,050 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:35,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:35,050 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:35,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:35,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,614 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:10:35,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:10:35,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:10:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:10:35,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:10:35,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:36,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:36,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:36,376 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:10:36,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:10:36,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:10:36,747 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:10:36,964 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:36,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:10:37,372 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:37,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:10:37,743 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:10:37,789 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:10:41,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1366#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:10:41,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:10:41,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:10:41,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-25 20:10:41,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759426019] [2021-11-25 20:10:41,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:10:41,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 20:10:41,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:41,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 20:10:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=490, Unknown=3, NotChecked=138, Total=702 [2021-11-25 20:10:41,606 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:44,844 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-25 20:10:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:10:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 20:10:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:44,845 INFO L225 Difference]: With dead ends: 24 [2021-11-25 20:10:44,845 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 20:10:44,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=82, Invalid=577, Unknown=3, NotChecked=150, Total=812 [2021-11-25 20:10:44,847 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:44,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 52 Unchecked, 1.4s Time] [2021-11-25 20:10:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 20:10:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-11-25 20:10:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-25 20:10:44,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-11-25 20:10:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:44,865 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-25 20:10:44,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-25 20:10:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:10:44,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:44,866 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:44,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:10:45,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:10:45,083 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash -768477186, now seen corresponding path program 11 times [2021-11-25 20:10:45,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:45,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969853333] [2021-11-25 20:10:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:45,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:45,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:10:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151950787] [2021-11-25 20:10:45,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:10:45,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:45,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:10:45,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:10:45,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 20:10:45,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:10:45,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:10:45,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:46,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:10:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:46,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969853333] [2021-11-25 20:10:46,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:10:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151950787] [2021-11-25 20:10:46,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151950787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637024716] [2021-11-25 20:10:46,697 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:10:46,697 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:46,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:46,698 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:46,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:46,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:46,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,180 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-25 20:10:47,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-25 20:10:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,721 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:10:47,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:10:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:10:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:10:47,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:48,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:48,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:48,374 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:10:48,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:10:48,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:10:48,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:48,716 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:10:48,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-25 20:10:48,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:48,937 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:10:48,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-25 20:10:49,306 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:49,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:10:49,665 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:49,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:10:49,744 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:10:51,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1547#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:10:51,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:10:51,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:10:51,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-11-25 20:10:51,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570675339] [2021-11-25 20:10:51,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:10:51,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 20:10:51,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 20:10:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:10:51,462 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:52,566 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-25 20:10:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:10:52,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 20:10:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:52,567 INFO L225 Difference]: With dead ends: 29 [2021-11-25 20:10:52,568 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:10:52,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:10:52,569 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:52,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:10:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:10:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-11-25 20:10:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 20:10:52,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2021-11-25 20:10:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:52,577 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 20:10:52,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:10:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 20:10:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:10:52,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:52,579 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 20:10:52,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:10:52,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:52,807 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:10:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:52,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1125314916, now seen corresponding path program 12 times [2021-11-25 20:10:52,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:52,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055889256] [2021-11-25 20:10:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:52,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:52,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:10:52,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924792841] [2021-11-25 20:10:52,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:10:52,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:52,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:52,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:10:52,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:10:52,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:10:52,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:10:52,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:10:53,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:53,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:10:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:54,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:54,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055889256] [2021-11-25 20:10:54,455 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:10:54,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924792841] [2021-11-25 20:10:54,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924792841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:54,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259937642] [2021-11-25 20:10:54,457 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:10:54,457 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:54,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:54,458 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:54,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:54,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:54,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,015 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:10:55,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:10:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:10:55,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:10:55,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-25 20:10:55,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:55,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:55,749 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-25 20:10:55,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 430 treesize of output 419 [2021-11-25 20:10:55,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:10:56,059 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:56,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:10:56,280 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:10:56,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:10:56,653 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:56,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:10:56,991 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:10:56,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:10:57,078 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:10:59,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1739#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:10:59,368 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:10:59,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:10:59,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-25 20:10:59,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660470338] [2021-11-25 20:10:59,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:10:59,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 20:10:59,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:59,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 20:10:59,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:10:59,371 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:00,667 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-25 20:11:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:11:00,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 20:11:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:00,669 INFO L225 Difference]: With dead ends: 20 [2021-11-25 20:11:00,669 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 20:11:00,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:11:00,670 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:00,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:11:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 20:11:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 20:11:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 20:11:00,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-11-25 20:11:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:00,678 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 20:11:00,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:11:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 20:11:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 20:11:00,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:00,679 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-11-25 20:11:00,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:00,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:00,880 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -524915445, now seen corresponding path program 13 times [2021-11-25 20:11:00,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220870710] [2021-11-25 20:11:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:00,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:00,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:11:00,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189260175] [2021-11-25 20:11:00,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:11:00,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:00,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:00,903 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:00,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:11:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:00,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-25 20:11:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:01,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:11:01,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:11:01,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 20:11:01,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:11:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 42 [2021-11-25 20:11:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:01,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2021-11-25 20:11:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:02,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-11-25 20:11:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 71 [2021-11-25 20:11:03,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 71 [2021-11-25 20:11:03,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 119 [2021-11-25 20:11:03,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2021-11-25 20:11:03,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2021-11-25 20:11:04,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 127 [2021-11-25 20:11:04,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-25 20:11:04,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 69 [2021-11-25 20:11:04,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2021-11-25 20:11:05,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 42 [2021-11-25 20:11:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:05,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:05,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:11:06,720 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6))) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse0 (= .cse2 1))) (let ((.cse1 (not .cse0)) (.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 4)))) (and (or .cse0 (forall ((v_ArrVal_753 (Array Int Int))) (= c_~N~0 (+ (select v_ArrVal_753 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_753) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)))))) (or .cse1 (= c_~N~0 (+ .cse2 .cse3 .cse4))) (or .cse0 (forall ((v_ArrVal_753 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_753) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1))) (or .cse1 (= .cse4 1))))))) is different from false [2021-11-25 20:11:22,482 WARN L227 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 76 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:11:34,295 WARN L227 SmtUtils]: Spent 10.14s on a formula simplification. DAG size of input: 75 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:11:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 20:11:54,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:54,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220870710] [2021-11-25 20:11:54,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:11:54,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189260175] [2021-11-25 20:11:54,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189260175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:54,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8915313] [2021-11-25 20:11:54,742 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:11:54,742 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:11:54,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:11:54,742 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:11:54,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:11:54,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:54,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,302 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:11:55,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:11:55,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:11:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:11:55,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:11:55,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:55,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:55,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:56,028 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:11:56,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:11:56,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:11:56,361 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:11:56,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:11:56,608 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:11:56,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:11:56,971 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:11:56,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:11:57,326 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:11:57,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:11:57,382 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:02,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1935#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:02,810 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:02,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:12:02,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-11-25 20:12:02,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500933327] [2021-11-25 20:12:02,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:02,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 20:12:02,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:02,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 20:12:02,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=775, Unknown=14, NotChecked=56, Total=930 [2021-11-25 20:12:02,813 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:11,151 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-11-25 20:12:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:12:11,152 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-25 20:12:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:11,152 INFO L225 Difference]: With dead ends: 27 [2021-11-25 20:12:11,152 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:12:11,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 55.2s TimeCoverageRelationStatistics Valid=96, Invalid=886, Unknown=14, NotChecked=60, Total=1056 [2021-11-25 20:12:11,154 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:11,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 248 Invalid, 0 Unknown, 28 Unchecked, 3.4s Time] [2021-11-25 20:12:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:12:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-11-25 20:12:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-25 20:12:11,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-25 20:12:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:11,161 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-25 20:12:11,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-25 20:12:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:12:11,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:11,162 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:11,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:11,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:12:11,363 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:11,363 INFO L85 PathProgramCache]: Analyzing trace with hash 907598972, now seen corresponding path program 14 times [2021-11-25 20:12:11,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:11,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548024298] [2021-11-25 20:12:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:11,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:11,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:12:11,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139285037] [2021-11-25 20:12:11,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:12:11,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:11,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:11,384 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:11,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:12:11,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 20:12:11,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:12:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:12:11,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:12,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:13,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:13,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548024298] [2021-11-25 20:12:13,398 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:12:13,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139285037] [2021-11-25 20:12:13,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139285037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:13,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [936201212] [2021-11-25 20:12:13,400 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:12:13,401 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:13,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:13,401 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:13,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:13,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:13,950 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:12:13,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:12:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:13,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:14,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:14,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:12:14,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:14,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:14,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:12:14,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:14,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:14,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:14,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:14,609 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:12:14,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:12:14,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:14,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:14,920 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:12:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-25 20:12:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:15,150 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-25 20:12:15,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-25 20:12:15,509 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:12:15,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:12:15,837 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:12:15,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:12:15,891 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:17,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:17,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:17,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:12:17,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-11-25 20:12:17,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52531241] [2021-11-25 20:12:17,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:17,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 20:12:17,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 20:12:17,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:12:17,642 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:18,810 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-25 20:12:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:12:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 20:12:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:18,811 INFO L225 Difference]: With dead ends: 32 [2021-11-25 20:12:18,811 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 20:12:18,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2021-11-25 20:12:18,813 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:18,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:12:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 20:12:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-11-25 20:12:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2021-11-25 20:12:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-25 20:12:18,820 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 17 [2021-11-25 20:12:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:18,821 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-25 20:12:18,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-25 20:12:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:12:18,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:18,822 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:18,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-25 20:12:19,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 20:12:19,031 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:19,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1564436066, now seen corresponding path program 15 times [2021-11-25 20:12:19,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:19,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160450294] [2021-11-25 20:12:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:19,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:19,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:12:19,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145845095] [2021-11-25 20:12:19,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:12:19,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:19,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:19,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:19,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 20:12:19,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:12:19,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:12:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:12:19,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:20,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:21,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:21,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160450294] [2021-11-25 20:12:21,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:12:21,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145845095] [2021-11-25 20:12:21,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145845095] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:21,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481310120] [2021-11-25 20:12:21,008 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:12:21,008 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:21,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:21,008 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:21,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,172 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:12:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-25 20:12:21,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,684 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-25 20:12:21,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-25 20:12:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:21,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-25 20:12:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:21,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:21,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:22,307 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-25 20:12:22,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 425 treesize of output 420 [2021-11-25 20:12:22,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:22,732 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:12:22,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-25 20:12:23,008 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-25 20:12:23,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-25 20:12:23,375 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:12:23,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-25 20:12:23,718 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-25 20:12:23,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-25 20:12:23,836 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:26,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2358#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= ~N~0 |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:26,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:26,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:12:26,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-25 20:12:26,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309259979] [2021-11-25 20:12:26,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:26,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 20:12:26,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:26,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 20:12:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:12:26,318 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:27,671 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-25 20:12:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:12:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 20:12:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:27,673 INFO L225 Difference]: With dead ends: 22 [2021-11-25 20:12:27,673 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:12:27,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 20:12:27,675 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:27,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 10 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:12:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:12:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 20:12:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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) [2021-11-25 20:12:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 20:12:27,683 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2021-11-25 20:12:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:27,683 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 20:12:27,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:27,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 20:12:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:12:27,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:27,685 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:27,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-25 20:12:27,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:27,899 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1252769207, now seen corresponding path program 16 times [2021-11-25 20:12:27,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:27,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611744074] [2021-11-25 20:12:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:27,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:27,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:12:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082398120] [2021-11-25 20:12:27,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:12:27,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:27,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:27,920 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:27,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 20:12:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:28,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-25 20:12:28,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:28,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:12:28,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:12:28,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 20:12:28,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:12:28,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 42 [2021-11-25 20:12:28,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:28,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2021-11-25 20:12:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 72 [2021-11-25 20:12:29,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:29,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 78 [2021-11-25 20:12:30,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:30,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 83 [2021-11-25 20:12:31,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,229 INFO L244 Elim1Store]: Index analysis took 114 ms [2021-11-25 20:12:31,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 83 [2021-11-25 20:12:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:31,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2021-11-25 20:12:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 85 [2021-11-25 20:12:32,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 126 [2021-11-25 20:12:32,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 33 [2021-11-25 20:12:32,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-25 20:12:33,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 78 [2021-11-25 20:12:33,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 40 [2021-11-25 20:12:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:34,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:34,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:12:35,442 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6))) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse4 (= .cse1 1))) (let ((.cse0 (not .cse4)) (.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 4)))) (and (or .cse0 (= c_~N~0 (+ .cse1 .cse2 .cse3))) (or (forall ((v_ArrVal_1032 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1032) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1)) .cse4) (or (forall ((v_ArrVal_1032 (Array Int Int))) (= c_~N~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1032) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) (select v_ArrVal_1032 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) .cse4) (or .cse0 (= .cse3 1))))))) is different from false [2021-11-25 20:12:37,099 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse17 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse13 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse17))) (.cse14 (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse15 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse17 4)))) (let ((.cse0 (= .cse13 1)) (.cse4 (= .cse15 1))) (let ((.cse1 (forall ((v_ArrVal_1031 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1031) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1))) (.cse5 (forall ((v_ArrVal_1032 (Array Int Int))) (= (+ (select v_ArrVal_1032 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1032) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4)))) c_~N~0))) (.cse11 (not .cse4)) (.cse12 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse14 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse17))) (.cse3 (not .cse0)) (.cse2 (forall ((v_ArrVal_1032 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1032) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1)))) (and (or .cse0 .cse1 .cse2) (or .cse3 .cse4 .cse5) (or .cse0 (forall ((v_ArrVal_1031 (Array Int Int))) (let ((.cse8 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1031) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8 4)))) (or (= (let ((.cse7 (select v_ArrVal_1031 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1031 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse8)) .cse7)) c_~N~0) (not (= .cse6 1))))))) (or .cse0 (forall ((v_ArrVal_1031 (Array Int Int))) (let ((.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse9 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1031) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10 4)))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1031 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse9 (select v_ArrVal_1031 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse10)) 1) (not (= .cse9 1))))))) (or .cse3 .cse11 (= .cse12 1)) (or .cse0 .cse1 .cse5) (or .cse3 .cse11 (= c_~N~0 (+ .cse13 .cse12 .cse14 .cse15))) (or .cse3 .cse4 .cse2))))))) is different from false [2021-11-25 20:12:41,894 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse28 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse23 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse28)))) (let ((.cse3 (forall ((v_ArrVal_1031 (Array Int Int))) (let ((.cse33 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse31 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1031) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse33)))) (or (= c_~N~0 (let ((.cse32 (select v_ArrVal_1031 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse31 .cse32 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1031 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse31 .cse32))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse33))))) (not (= .cse31 1))))))) (.cse10 (forall ((v_ArrVal_1031 (Array Int Int))) (let ((.cse30 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse29 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1031) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse30)))) (or (not (= .cse29 1)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1031 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse29 (select v_ArrVal_1031 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse30)) 1)))))) (.cse11 (forall ((v_ArrVal_1032 (Array Int Int))) (= (+ (select v_ArrVal_1032 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1032) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 (* |c_ULTIMATE.start_main_~i~0#1| 4)))) c_~N~0))) (.cse5 (forall ((v_ArrVal_1031 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1031) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1))) (.cse2 (forall ((v_ArrVal_1032 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1032) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1))) (.cse0 (= .cse23 1))) (and (or .cse0 (let ((.cse1 (forall ((v_ArrVal_1027 (Array Int Int))) (let ((.cse17 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse16 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1027) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse17 4)))) (or (not (= .cse16 1)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1027 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ (select v_ArrVal_1027 |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse17)) 1)))))) (.cse4 (forall ((v_ArrVal_1027 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1027) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 1)))) (and (or .cse1 .cse2) (or .cse3 .cse4) (or .cse4 .cse5 .cse2) (forall ((v_ArrVal_1027 (Array Int Int))) (let ((.cse9 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse7 (select v_ArrVal_1027 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1027) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse9 4)))) (let ((.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1027 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse9)))) (or (not (= .cse6 1)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1027 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse6 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse9)) 1) (not (= .cse8 1))))))) (or .cse10 .cse4) (or .cse1 .cse11) (or .cse4 .cse5 .cse11) (forall ((v_ArrVal_1027 (Array Int Int))) (let ((.cse15 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse14 (select v_ArrVal_1027 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse13 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_1027) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse15 4)))) (let ((.cse12 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1027 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 .cse13))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse15)))) (or (not (= .cse12 1)) (not (= .cse13 1)) (= c_~N~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_1027 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse14 .cse12 .cse13))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse15)) .cse14 .cse12 .cse13)))))))))) (or (let ((.cse27 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse25 (select .cse27 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse26 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse27 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse23 .cse25))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse28 4)))) (let ((.cse24 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse27 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse23 .cse25 .cse26))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse28)))) (let ((.cse18 (= .cse26 1)) (.cse22 (= .cse24 1))) (let ((.cse19 (not .cse22)) (.cse20 (not .cse18)) (.cse21 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse27 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse23 .cse24 .cse25 .cse26))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse28)))) (and (or .cse3 .cse18) (or .cse19 .cse20 (= .cse21 1)) (or .cse20 .cse22 .cse11) (or .cse20 .cse22 .cse2) (or .cse10 .cse18) (or .cse5 .cse18 .cse11) (or .cse19 .cse20 (= (+ .cse23 .cse21 .cse24 .cse25 .cse26) c_~N~0)) (or .cse5 .cse18 .cse2)))))))) (not .cse0)))))) is different from false [2021-11-25 20:12:58,106 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-25 20:12:58,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-25 20:12:58,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611744074] [2021-11-25 20:12:58,113 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:12:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082398120] [2021-11-25 20:12:58,113 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-25 20:12:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669944294] [2021-11-25 20:12:58,118 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:12:58,118 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:58,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:58,118 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:58,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:58,120 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:267) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 45 more [2021-11-25 20:12:58,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:12:58,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-25 20:12:58,125 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-25 20:12:58,125 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-25 20:12:58,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:12:58,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-25 20:12:58,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:12:58,379 INFO L732 BasicCegarLoop]: Path program histogram: [16, 1, 1] [2021-11-25 20:12:58,381 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:12:58,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:12:58 BoogieIcfgContainer [2021-11-25 20:12:58,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:12:58,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:12:58,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:12:58,402 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:12:58,402 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:09:21" (3/4) ... [2021-11-25 20:12:58,405 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:12:58,405 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:12:58,406 INFO L158 Benchmark]: Toolchain (without parser) took 217772.41ms. Allocated memory was 113.2MB in the beginning and 197.1MB in the end (delta: 83.9MB). Free memory was 72.2MB in the beginning and 166.9MB in the end (delta: -94.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:12:58,406 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 89.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:12:58,406 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.99ms. Allocated memory is still 113.2MB. Free memory was 71.9MB in the beginning and 86.8MB in the end (delta: -14.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:12:58,407 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.69ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 85.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:12:58,407 INFO L158 Benchmark]: Boogie Preprocessor took 49.60ms. Allocated memory is still 113.2MB. Free memory was 84.7MB in the beginning and 83.9MB in the end (delta: 874.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:12:58,407 INFO L158 Benchmark]: RCFGBuilder took 346.34ms. Allocated memory is still 113.2MB. Free memory was 83.9MB in the beginning and 71.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 20:12:58,408 INFO L158 Benchmark]: TraceAbstraction took 217038.87ms. Allocated memory was 113.2MB in the beginning and 197.1MB in the end (delta: 83.9MB). Free memory was 71.3MB in the beginning and 167.9MB in the end (delta: -96.6MB). Peak memory consumption was 102.9MB. Max. memory is 16.1GB. [2021-11-25 20:12:58,408 INFO L158 Benchmark]: Witness Printer took 4.02ms. Allocated memory is still 197.1MB. Free memory was 167.9MB in the beginning and 166.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:12:58,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 89.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 290.99ms. Allocated memory is still 113.2MB. Free memory was 71.9MB in the beginning and 86.8MB in the end (delta: -14.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.69ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 85.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 49.60ms. Allocated memory is still 113.2MB. Free memory was 84.7MB in the beginning and 83.9MB in the end (delta: 874.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 346.34ms. Allocated memory is still 113.2MB. Free memory was 83.9MB in the beginning and 71.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 217038.87ms. Allocated memory was 113.2MB in the beginning and 197.1MB in the end (delta: 83.9MB). Free memory was 71.3MB in the beginning and 167.9MB in the end (delta: -96.6MB). Peak memory consumption was 102.9MB. Max. memory is 16.1GB. * Witness Printer took 4.02ms. Allocated memory is still 197.1MB. Free memory was 167.9MB in the beginning and 166.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND TRUE !cond [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7 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 -> 1a3387bc5e2da462b89ff029159e07dcc81e24b9a3389e54a743d70d22e0e9eb [2021-11-25 20:13:01,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:13:01,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:13:01,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:13:01,226 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:13:01,227 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:13:01,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/s1if.c [2021-11-25 20:13:01,299 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/data/4f491cc51/75a142f1392a4ad387a06730517de051/FLAG860e18e6f [2021-11-25 20:13:01,847 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:13:01,848 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/sv-benchmarks/c/array-fpi/s1if.c [2021-11-25 20:13:01,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/data/4f491cc51/75a142f1392a4ad387a06730517de051/FLAG860e18e6f [2021-11-25 20:13:02,208 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/data/4f491cc51/75a142f1392a4ad387a06730517de051 [2021-11-25 20:13:02,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:13:02,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:13:02,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:13:02,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:13:02,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:13:02,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46dc0e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02, skipping insertion in model container [2021-11-25 20:13:02,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:13:02,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:13:02,423 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-25 20:13:02,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:13:02,475 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:13:02,530 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/sv-benchmarks/c/array-fpi/s1if.c[587,600] [2021-11-25 20:13:02,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:13:02,581 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:13:02,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02 WrapperNode [2021-11-25 20:13:02,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:13:02,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:13:02,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:13:02,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:13:02,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,640 INFO L137 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-25 20:13:02,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:13:02,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:13:02,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:13:02,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:13:02,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:13:02,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:13:02,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:13:02,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:13:02,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (1/1) ... [2021-11-25 20:13:02,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:13:02,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:02,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:13:02,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:13:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:13:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:13:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:13:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:13:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 20:13:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:13:02,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:13:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:13:02,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 20:13:02,893 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:13:02,894 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:13:03,127 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:13:03,133 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:13:03,150 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:13:03,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:13:03 BoogieIcfgContainer [2021-11-25 20:13:03,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:13:03,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:13:03,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:13:03,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:13:03,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:13:02" (1/3) ... [2021-11-25 20:13:03,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b98b8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:13:03, skipping insertion in model container [2021-11-25 20:13:03,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:02" (2/3) ... [2021-11-25 20:13:03,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b98b8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:13:03, skipping insertion in model container [2021-11-25 20:13:03,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:13:03" (3/3) ... [2021-11-25 20:13:03,160 INFO L111 eAbstractionObserver]: Analyzing ICFG s1if.c [2021-11-25 20:13:03,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:13:03,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:13:03,225 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:13:03,237 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:13:03,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:13:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-11-25 20:13:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:13:03,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:03,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:03,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-11-25 20:13:03,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:13:03,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862724701] [2021-11-25 20:13:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:03,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:13:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:13:03,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:13:03,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:13:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 20:13:03,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:03,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:13:03,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:13:03,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862724701] [2021-11-25 20:13:03,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862724701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:03,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:03,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:13:03,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638409193] [2021-11-25 20:13:03,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:03,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:13:03,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:13:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:13:03,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:13:03,482 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-25 20:13:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:03,496 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-11-25 20:13:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:13:03,498 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-11-25 20:13:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:03,506 INFO L225 Difference]: With dead ends: 34 [2021-11-25 20:13:03,506 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:13:03,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:13:03,513 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:03,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:13:03,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:13:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 20:13:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 20:13:03,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-25 20:13:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:03,550 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 20:13:03,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-25 20:13:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 20:13:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:13:03,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:03,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:03,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 20:13:03,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:13:03,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-11-25 20:13:03,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:13:03,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502600474] [2021-11-25 20:13:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:03,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:13:03,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:13:03,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:13:03,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:13:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:03,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:13:03,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:04,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:13:04,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:13:04,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502600474] [2021-11-25 20:13:04,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502600474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:04,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:04,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:13:04,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42585232] [2021-11-25 20:13:04,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:04,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:13:04,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:13:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:13:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:13:04,048 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-25 20:13:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:04,241 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-25 20:13:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:13:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-11-25 20:13:04,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:04,244 INFO L225 Difference]: With dead ends: 28 [2021-11-25 20:13:04,244 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:13:04,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:13:04,246 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:04,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 8 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:13:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-25 20:13:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-25 20:13:04,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-25 20:13:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:04,254 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-25 20:13:04,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-25 20:13:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-25 20:13:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 20:13:04,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:04,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:04,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:04,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:13:04,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-11-25 20:13:04,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:13:04,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980978542] [2021-11-25 20:13:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:04,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:13:04,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:13:04,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:13:04,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:13:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:04,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 20:13:04,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:04,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:13:04,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 20:13:04,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 20:13:05,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 20:13:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-11-25 20:13:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:05,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:10,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:10,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:13:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980978542] [2021-11-25 20:13:10,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980978542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:10,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2023105182] [2021-11-25 20:13:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:10,420 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:13:10,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:13:10,430 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:13:10,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-25 20:13:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:13:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:10,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:13:10,795 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 20:13:10,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 34 [2021-11-25 20:13:11,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:11,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 20:13:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:11,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:12,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:12,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2023105182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:12,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853517842] [2021-11-25 20:13:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:12,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:12,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:12,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:12,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:13:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:12,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:13:12,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:12,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:13:12,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 20:13:12,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:13:12,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-11-25 20:13:14,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-11-25 20:13:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:15,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:23,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:13:23,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-25 20:13:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:23,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-25 20:13:23,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-25 20:13:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:24,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853517842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:24,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:13:24,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 10, 11] total 36 [2021-11-25 20:13:24,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612740513] [2021-11-25 20:13:24,030 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:24,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 20:13:24,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:13:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 20:13:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1021, Unknown=11, NotChecked=0, Total=1260 [2021-11-25 20:13:24,036 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:24,752 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-25 20:13:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:13:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-25 20:13:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:24,754 INFO L225 Difference]: With dead ends: 28 [2021-11-25 20:13:24,754 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:13:24,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=303, Invalid=1326, Unknown=11, NotChecked=0, Total=1640 [2021-11-25 20:13:24,757 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:24,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2021-11-25 20:13:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:13:24,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-25 20:13:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-11-25 20:13:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-25 20:13:24,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-11-25 20:13:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:24,772 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-25 20:13:24,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-25 20:13:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 20:13:24,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:24,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:24,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:24,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-25 20:13:25,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:25,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:25,381 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2021-11-25 20:13:25,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:13:25,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229678785] [2021-11-25 20:13:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:25,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:13:25,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:13:25,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:13:25,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:13:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:13:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:25,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:13:25,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:13:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:25,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:25,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 20:13:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 20:13:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:25,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:13:25,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229678785] [2021-11-25 20:13:25,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229678785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:25,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [861123888] [2021-11-25 20:13:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:25,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:13:25,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:13:25,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:13:25,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-25 20:13:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:25,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:13:25,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:25,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:13:25,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:13:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:25,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:25,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 20:13:25,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 20:13:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:25,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [861123888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807172434] [2021-11-25 20:13:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:25,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:25,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:25,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:25,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:13:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:26,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:13:26,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:26,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:13:26,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:13:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:26,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:26,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 20:13:26,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 20:13:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807172434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:26,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:13:26,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-25 20:13:26,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629298384] [2021-11-25 20:13:26,199 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:26,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 20:13:26,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:13:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 20:13:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:13:26,200 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2021-11-25 20:13:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:26,399 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-25 20:13:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:13:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-25 20:13:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:26,400 INFO L225 Difference]: With dead ends: 33 [2021-11-25 20:13:26,400 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 20:13:26,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:13:26,402 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:26,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 20:13:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-25 20:13:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-11-25 20:13:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-25 20:13:26,410 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-11-25 20:13:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:26,410 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-25 20:13:26,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2021-11-25 20:13:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-25 20:13:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:13:26,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:26,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:26,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:26,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:26,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 20:13:27,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:27,019 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:27,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-11-25 20:13:27,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:13:27,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10940316] [2021-11-25 20:13:27,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:13:27,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:13:27,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:13:27,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:13:27,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:13:27,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:13:27,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:27,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:13:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:27,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:27,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:13:27,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10940316] [2021-11-25 20:13:27,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10940316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:27,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1293733453] [2021-11-25 20:13:27,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:13:27,813 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:13:27,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:13:27,814 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:13:27,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-25 20:13:27,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:13:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:27,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:13:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:28,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:28,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1293733453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:28,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790437060] [2021-11-25 20:13:28,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:13:28,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:28,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:28,281 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:28,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:13:28,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:13:28,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:28,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:13:28,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:28,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:28,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790437060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:28,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:13:28,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 8, 7] total 25 [2021-11-25 20:13:28,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716203525] [2021-11-25 20:13:28,698 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:28,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:13:28,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:13:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:13:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:13:28,700 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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) [2021-11-25 20:13:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:29,656 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-11-25 20:13:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:13:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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 18 [2021-11-25 20:13:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:29,672 INFO L225 Difference]: With dead ends: 54 [2021-11-25 20:13:29,672 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 20:13:29,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 20:13:29,674 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 208 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:29,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 21 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:13:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 20:13:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2021-11-25 20:13:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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) [2021-11-25 20:13:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-25 20:13:29,691 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 18 [2021-11-25 20:13:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:29,691 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-25 20:13:29,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 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) [2021-11-25 20:13:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-25 20:13:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:13:29,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:29,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:29,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:29,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:30,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:30,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:30,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:30,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:30,306 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-11-25 20:13:30,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:13:30,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573982107] [2021-11-25 20:13:30,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:30,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:13:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:13:30,308 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:13:30,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 20:13:30,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:13:30,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:13:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:30,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:30,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:13:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573982107] [2021-11-25 20:13:30,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573982107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787178503] [2021-11-25 20:13:30,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:30,849 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:13:30,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:13:30,854 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:13:30,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-25 20:13:30,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:13:30,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:30,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:13:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:31,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:31,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1787178503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:31,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440200449] [2021-11-25 20:13:31,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:31,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:31,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:31,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:31,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:13:31,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:13:31,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:13:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:31,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:31,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440200449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:31,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:13:31,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 17 [2021-11-25 20:13:31,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134818654] [2021-11-25 20:13:31,544 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:31,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 20:13:31,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:13:31,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 20:13:31,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:13:31,546 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:32,095 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-25 20:13:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:13:32,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 20:13:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:32,096 INFO L225 Difference]: With dead ends: 46 [2021-11-25 20:13:32,096 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 20:13:32,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:13:32,097 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:32,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 16 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:13:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 20:13:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-25 20:13:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-25 20:13:32,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 19 [2021-11-25 20:13:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:32,104 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-25 20:13:32,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-25 20:13:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:13:32,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:32,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:32,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:32,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-25 20:13:32,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:32,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:32,706 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:32,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:32,707 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-11-25 20:13:32,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:13:32,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880221026] [2021-11-25 20:13:32,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:13:32,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:13:32,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:13:32,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:13:32,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 20:13:32,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:13:32,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:32,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 20:13:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:32,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:13:32,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 20:13:32,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:13:33,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 20:13:33,597 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 20:13:33,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2021-11-25 20:13:33,863 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 20:13:33,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2021-11-25 20:13:34,045 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 20:13:34,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 26 [2021-11-25 20:13:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:34,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:36,973 INFO L354 Elim1Store]: treesize reduction 16, result has 62.8 percent of original size [2021-11-25 20:13:36,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 197 treesize of output 153 [2021-11-25 20:14:00,635 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:14:00,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 1 [2021-11-25 20:14:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:00,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:14:00,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880221026] [2021-11-25 20:14:00,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880221026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:00,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [822419721] [2021-11-25 20:14:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:00,645 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:14:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:14:00,646 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:14:00,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-25 20:14:00,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:00,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:00,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 20:14:00,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:00,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:14:01,077 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:14:01,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 20:14:01,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:14:01,409 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:14:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 20:14:01,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:14:04,462 INFO L354 Elim1Store]: treesize reduction 41, result has 37.9 percent of original size [2021-11-25 20:14:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 44 treesize of output 40 [2021-11-25 20:14:05,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:05,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-11-25 20:14:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:05,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-11-25 20:14:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:05,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:24,089 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:14:24,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 1 [2021-11-25 20:14:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:24,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [822419721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:24,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923016694] [2021-11-25 20:14:24,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:24,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:24,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:24,106 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:24,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 20:14:24,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:24,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 20:14:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:24,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:14:24,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 20:14:24,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:14:25,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:14:32,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-11-25 20:14:34,914 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-25 20:14:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-11-25 20:14:37,223 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-25 20:14:37,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 28 [2021-11-25 20:14:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:37,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:20,151 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:15:20,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 1 [2021-11-25 20:15:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:20,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923016694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:20,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:15:20,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 14, 12] total 63 [2021-11-25 20:15:20,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697965143] [2021-11-25 20:15:20,169 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:20,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-25 20:15:20,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:15:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-25 20:15:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=3387, Unknown=33, NotChecked=0, Total=3906 [2021-11-25 20:15:20,173 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 63 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 63 states have internal predecessors, (91), 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) [2021-11-25 20:15:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:33,770 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-25 20:15:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:15:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 63 states have internal predecessors, (91), 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 21 [2021-11-25 20:15:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:33,771 INFO L225 Difference]: With dead ends: 38 [2021-11-25 20:15:33,772 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 20:15:33,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 94.0s TimeCoverageRelationStatistics Valid=715, Invalid=4801, Unknown=34, NotChecked=0, Total=5550 [2021-11-25 20:15:33,775 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:33,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 87 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 101 Unchecked, 1.5s Time] [2021-11-25 20:15:33,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 20:15:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-25 20:15:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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) [2021-11-25 20:15:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-25 20:15:33,794 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2021-11-25 20:15:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:33,794 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-25 20:15:33,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 63 states have internal predecessors, (91), 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) [2021-11-25 20:15:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-25 20:15:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:15:33,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:33,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:33,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:34,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:34,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:34,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:15:34,396 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2021-11-25 20:15:34,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:15:34,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036826745] [2021-11-25 20:15:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:34,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:15:34,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:15:34,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:15:34,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 20:15:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:34,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:15:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:34,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-25 20:15:35,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:15:35,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:15:36,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 20:15:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:36,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:36,849 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_279 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_279) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:15:36,964 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_279 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_279) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:15:37,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:15:37,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 20:15:37,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:15:37,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:15:37,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:15:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 20:15:38,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:15:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036826745] [2021-11-25 20:15:38,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036826745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1265076822] [2021-11-25 20:15:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:38,069 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:15:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:15:38,070 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:15:38,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 20:15:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:15:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:39,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:15:40,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:40,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:15:41,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:15:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:41,676 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_298 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_298) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 20:15:41,795 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_298 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_298) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 20:15:41,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:15:41,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 20:15:42,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:15:42,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:15:42,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:15:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 20:15:42,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1265076822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239500338] [2021-11-25 20:15:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:42,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:42,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:42,344 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:42,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 20:15:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:42,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:15:42,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:42,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 20:15:43,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:15:44,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:15:45,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:15:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:45,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:45,887 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:15:46,000 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:15:46,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:15:46,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 20:15:46,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:15:46,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:15:46,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:15:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 20:15:46,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239500338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:46,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:15:46,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 31 [2021-11-25 20:15:46,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188881155] [2021-11-25 20:15:46,515 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:46,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 20:15:46,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:15:46,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 20:15:46,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=505, Unknown=6, NotChecked=306, Total=930 [2021-11-25 20:15:46,518 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 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) [2021-11-25 20:15:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:48,691 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-25 20:15:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:15:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 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 21 [2021-11-25 20:15:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:48,694 INFO L225 Difference]: With dead ends: 36 [2021-11-25 20:15:48,694 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:15:48,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 6 IntricatePredicates, 2 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=138, Invalid=582, Unknown=6, NotChecked=330, Total=1056 [2021-11-25 20:15:48,696 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:48,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 114 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 79 Unchecked, 0.9s Time] [2021-11-25 20:15:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:15:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 20:15:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-11-25 20:15:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-25 20:15:48,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-11-25 20:15:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:48,703 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-25 20:15:48,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 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) [2021-11-25 20:15:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-25 20:15:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 20:15:48,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:48,704 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:48,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:48,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:49,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-25 20:15:49,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:49,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2021-11-25 20:15:49,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:15:49,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591838511] [2021-11-25 20:15:49,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 20:15:49,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:15:49,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:15:49,321 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:15:49,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 20:15:49,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 20:15:49,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:15:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:52,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:54,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:15:54,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591838511] [2021-11-25 20:15:54,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591838511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:54,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678241801] [2021-11-25 20:15:54,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 20:15:54,734 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:15:54,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:15:54,735 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:15:54,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 20:15:54,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 20:15:54,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:15:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:58,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:02,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678241801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:02,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082207077] [2021-11-25 20:16:02,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 20:16:02,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:02,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:02,306 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:02,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 20:16:02,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 20:16:02,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:02,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:16:02,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:04,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:05,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082207077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:05,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:16:05,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13, 12, 14, 12] total 38 [2021-11-25 20:16:05,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158178752] [2021-11-25 20:16:05,374 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:05,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 20:16:05,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:16:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 20:16:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:16:05,376 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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) [2021-11-25 20:16:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:15,877 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-25 20:16:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:16:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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 23 [2021-11-25 20:16:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:15,879 INFO L225 Difference]: With dead ends: 57 [2021-11-25 20:16:15,879 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 20:16:15,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=708, Invalid=2154, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 20:16:15,882 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 216 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:15,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 25 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 20:16:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 20:16:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-11-25 20:16:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 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) [2021-11-25 20:16:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-25 20:16:15,892 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 23 [2021-11-25 20:16:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:15,893 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-25 20:16:15,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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) [2021-11-25 20:16:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-25 20:16:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:16:15,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:15,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:15,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-25 20:16:16,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:16,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:16,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:16,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 6 times [2021-11-25 20:16:16,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:16:16,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715730942] [2021-11-25 20:16:16,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 20:16:16,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:16:16,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:16:16,501 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:16:16,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 20:16:16,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-25 20:16:16,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 20:16:16,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 20:16:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:16:17,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:16:18,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:16:18,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:16:19,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-11-25 20:16:20,631 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 20:16:20,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 37 [2021-11-25 20:16:22,283 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 20:16:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 54 [2021-11-25 20:16:24,352 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 20:16:24,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-25 20:16:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:16:24,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:41,684 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:16:41,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 365 treesize of output 1 [2021-11-25 20:16:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 5 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:16:41,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:16:41,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715730942] [2021-11-25 20:16:41,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715730942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:41,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2092969324] [2021-11-25 20:16:41,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 20:16:41,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:16:41,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:16:41,704 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:16:41,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-25 20:16:41,839 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:16:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982287363] [2021-11-25 20:16:41,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 20:16:41,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:41,845 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:41,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 1 [2021-11-25 20:16:41,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 20:16:41,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-25 20:16:41,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 20:16:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:42,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:16:42,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 20:16:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:16:42,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:16:42,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:16:43,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-11-25 20:16:44,231 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 20:16:44,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 37 [2021-11-25 20:16:45,010 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-25 20:16:45,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 54 [2021-11-25 20:16:45,812 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 20:16:45,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-25 20:16:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:16:45,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:53,289 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:16:53,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 365 treesize of output 1 [2021-11-25 20:16:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 5 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:16:53,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982287363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:53,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 20:16:53,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 16] total 31 [2021-11-25 20:16:53,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736409220] [2021-11-25 20:16:53,338 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:53,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 20:16:53,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:16:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 20:16:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=789, Unknown=4, NotChecked=0, Total=930 [2021-11-25 20:16:53,340 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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) [2021-11-25 20:17:09,824 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 88 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:17:30,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:17:32,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:17:41,653 WARN L227 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 85 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:17:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:54,469 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-11-25 20:17:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 20:17:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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 26 [2021-11-25 20:17:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:54,474 INFO L225 Difference]: With dead ends: 74 [2021-11-25 20:17:54,474 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 20:17:54,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 70.9s TimeCoverageRelationStatistics Valid=458, Invalid=2508, Unknown=4, NotChecked=0, Total=2970 [2021-11-25 20:17:54,477 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 64 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:54,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 46 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 254 Invalid, 2 Unknown, 78 Unchecked, 11.8s Time] [2021-11-25 20:17:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 20:17:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2021-11-25 20:17:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 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) [2021-11-25 20:17:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-11-25 20:17:54,490 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 26 [2021-11-25 20:17:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:54,491 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-11-25 20:17:54,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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) [2021-11-25 20:17:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-11-25 20:17:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:17:54,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:54,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:54,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:54,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:54,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:54,898 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 2 times [2021-11-25 20:17:54,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:17:54,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869092114] [2021-11-25 20:17:54,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:17:54,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:17:54,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:17:54,900 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:17:54,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 20:17:55,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:17:55,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:17:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:17:55,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:55,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 20:17:56,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:17:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:17:58,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:17:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 20:17:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:59,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:00,724 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_474) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:00,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_474) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:01,075 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_474) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:01,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:01,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 20:18:01,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:01,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:18:01,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:18:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-25 20:18:03,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869092114] [2021-11-25 20:18:03,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869092114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752089950] [2021-11-25 20:18:03,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:18:03,652 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:03,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:03,653 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:03,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-25 20:18:03,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:18:03,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053292411] [2021-11-25 20:18:03,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:18:03,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:03,805 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:03,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 1 [2021-11-25 20:18:03,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 20:18:03,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:18:03,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:03,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 20:18:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:03,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 20:18:06,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:18:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:18:09,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:18:11,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:18:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:11,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:11,835 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_517 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_517) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:11,986 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_517 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_517) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:12,177 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_517 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_517) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:12,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:12,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 20:18:12,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:18:12,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:18:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-25 20:18:13,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053292411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:13,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 20:18:13,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 30 [2021-11-25 20:18:13,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493227322] [2021-11-25 20:18:13,505 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:13,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-25 20:18:13,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-25 20:18:13,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=474, Unknown=6, NotChecked=294, Total=870 [2021-11-25 20:18:13,507 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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) [2021-11-25 20:18:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:22,833 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-11-25 20:18:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:18:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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 26 [2021-11-25 20:18:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:22,839 INFO L225 Difference]: With dead ends: 68 [2021-11-25 20:18:22,839 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 20:18:22,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=151, Invalid=737, Unknown=6, NotChecked=366, Total=1260 [2021-11-25 20:18:22,841 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:22,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 85 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 254 Invalid, 0 Unknown, 147 Unchecked, 5.4s Time] [2021-11-25 20:18:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 20:18:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-25 20:18:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 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) [2021-11-25 20:18:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-11-25 20:18:22,853 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 26 [2021-11-25 20:18:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:22,853 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-11-25 20:18:22,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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) [2021-11-25 20:18:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-11-25 20:18:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:18:22,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:22,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:22,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:23,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:23,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:23,268 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1441936411, now seen corresponding path program 3 times [2021-11-25 20:18:23,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:23,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409961261] [2021-11-25 20:18:23,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:18:23,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:23,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:23,270 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:23,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-25 20:18:23,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 20:18:23,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:23,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:18:23,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:23,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 20:18:24,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 20:18:25,283 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:18:25,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 20:18:26,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:18:27,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 20:18:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:18:27,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:28,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:28,935 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:29,129 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_541 (_ BitVec 32))) (= (select (select (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_541)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:29,236 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_541 (_ BitVec 32))) (= (select (select (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_541)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:29,661 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-25 20:18:29,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-11-25 20:18:29,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:29,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:18:29,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:18:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-25 20:18:31,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:18:31,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409961261] [2021-11-25 20:18:31,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409961261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:31,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [206557088] [2021-11-25 20:18:31,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:18:31,179 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:18:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:18:31,180 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:18:31,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-25 20:18:31,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:18:31,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680791325] [2021-11-25 20:18:31,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:18:31,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:31,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:31,342 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:31,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 1 [2021-11-25 20:18:31,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 20:18:31,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 20:18:31,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:18:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:31,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 20:18:33,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 20:18:34,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:18:34,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 20:18:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:18:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:18:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:40,107 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_588 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_588) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)))) (= (_ bv1 32) |c_ULTIMATE.start_main_#t~mem8#1|)) is different from false [2021-11-25 20:18:42,060 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_588 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_588) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)))) (forall ((v_ArrVal_587 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_587) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2021-11-25 20:18:42,294 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_588 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_588) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)))) (forall ((v_ArrVal_587 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_587) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)))) is different from false [2021-11-25 20:18:42,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_587 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_588 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_586 (_ BitVec 32))) (let ((.cse0 (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|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_586)))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_587) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)) (not (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_588) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)))))) is different from false [2021-11-25 20:18:42,977 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_587 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_588 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_586 (_ BitVec 32))) (let ((.cse0 (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|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_586)))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_587) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)) (not (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_588) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32)))))) is different from false [2021-11-25 20:18:43,402 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-25 20:18:43,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 51 [2021-11-25 20:18:44,016 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-11-25 20:18:44,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 66 [2021-11-25 20:18:44,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-25 20:18:44,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:18:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2021-11-25 20:18:44,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680791325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:44,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 20:18:44,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9, 14] total 36 [2021-11-25 20:18:44,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441054376] [2021-11-25 20:18:44,734 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:44,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 20:18:44,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:18:44,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 20:18:44,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=601, Unknown=10, NotChecked=522, Total=1260 [2021-11-25 20:18:44,736 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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) [2021-11-25 20:18:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:50,707 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-11-25 20:18:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:18:50,708 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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 26 [2021-11-25 20:18:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:50,709 INFO L225 Difference]: With dead ends: 62 [2021-11-25 20:18:50,709 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 20:18:50,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=127, Invalid=601, Unknown=10, NotChecked=522, Total=1260 [2021-11-25 20:18:50,711 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:50,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 92 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 219 Invalid, 0 Unknown, 303 Unchecked, 4.4s Time] [2021-11-25 20:18:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 20:18:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-25 20:18:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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) [2021-11-25 20:18:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-25 20:18:50,720 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-11-25 20:18:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:50,720 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-25 20:18:50,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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) [2021-11-25 20:18:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-25 20:18:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 20:18:50,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:50,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:50,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:50,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:51,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:51,135 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1961716541, now seen corresponding path program 4 times [2021-11-25 20:18:51,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:18:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705184974] [2021-11-25 20:18:51,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:18:51,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:18:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:18:51,137 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:18:51,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-25 20:18:51,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:18:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:51,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 20:18:51,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:51,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 20:18:52,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:18:54,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:18:54,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:18:55,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:18:56,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 20:18:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:57,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:58,511 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_617) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:58,665 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_617) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:18:58,861 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_617) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32))))) is different from false [2021-11-25 20:18:59,112 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_617) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32))) (_ bv1 32))) is different from false [2021-11-25 20:18:59,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:59,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 20:18:59,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:59,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:18:59,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:19:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 22 not checked. [2021-11-25 20:19:02,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:19:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705184974] [2021-11-25 20:19:02,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705184974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1428726172] [2021-11-25 20:19:02,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:19:02,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:19:02,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:19:02,600 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:19:02,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-25 20:19:02,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:19:02,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:19:02,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 20:19:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:06,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:19:09,469 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:19:09,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-25 20:19:09,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:19:12,173 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:19:12,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-25 20:19:12,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:19:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:14,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:19:16,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:19:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:16,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:17,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_646 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_646) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:19:17,370 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_646 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_646) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:19:17,565 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_646 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_646) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32))) (_ bv1 32))) is different from false [2021-11-25 20:19:17,756 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_646 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_646) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32))) (_ bv1 32))) is different from false [2021-11-25 20:19:17,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:17,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 20:19:18,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:18,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:19:18,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:19:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 22 not checked. [2021-11-25 20:19:18,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1428726172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:18,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120809958] [2021-11-25 20:19:18,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:19:18,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:18,887 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:18,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 20:19:18,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:19:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:19:18,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:19:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:19,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-25 20:19:23,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:19:25,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:19:27,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:19:28,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:19:30,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:19:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:30,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:31,077 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_675) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (_ bv1 32))) is different from false [2021-11-25 20:19:31,226 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_675) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-25 20:19:31,418 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_675) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32))) (_ bv1 32))) is different from false [2021-11-25 20:19:31,606 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 32) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_675) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32))))) is different from false [2021-11-25 20:19:31,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:31,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 20:19:31,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:19:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 20:19:31,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:19:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 22 not checked. [2021-11-25 20:19:32,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120809958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:32,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:19:32,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 51 [2021-11-25 20:19:32,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011358451] [2021-11-25 20:19:32,701 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:19:32,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 20:19:32,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:19:32,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 20:19:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1317, Unknown=12, NotChecked=1020, Total=2550 [2021-11-25 20:19:32,703 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 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) [2021-11-25 20:19:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:36,836 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-11-25 20:19:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:19:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 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 31 [2021-11-25 20:19:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:36,838 INFO L225 Difference]: With dead ends: 62 [2021-11-25 20:19:36,838 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 20:19:36,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 12 IntricatePredicates, 2 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=227, Invalid=1449, Unknown=12, NotChecked=1068, Total=2756 [2021-11-25 20:19:36,840 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:36,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 130 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 129 Unchecked, 1.2s Time] [2021-11-25 20:19:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 20:19:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-25 20:19:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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) [2021-11-25 20:19:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-11-25 20:19:36,850 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 31 [2021-11-25 20:19:36,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:36,850 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-11-25 20:19:36,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 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) [2021-11-25 20:19:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-11-25 20:19:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 20:19:36,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:36,853 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:36,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:37,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-25 20:19:37,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:37,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:19:37,459 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:37,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1341982843, now seen corresponding path program 5 times [2021-11-25 20:19:37,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:19:37,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299605030] [2021-11-25 20:19:37,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 20:19:37,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:19:37,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:19:37,461 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:19:37,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-25 20:19:37,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 20:19:37,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:19:37,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 20:19:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:46,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:19:56,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:19:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299605030] [2021-11-25 20:19:56,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299605030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:56,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [535720874] [2021-11-25 20:19:56,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 20:19:56,463 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:19:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:19:56,464 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:19:56,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-25 20:19:57,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 20:19:57,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:19:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:19:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:06,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:10,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [535720874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:10,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288663377] [2021-11-25 20:20:10,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 20:20:10,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:10,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:10,327 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:10,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-25 20:20:10,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-25 20:20:10,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:20:10,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:20:10,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:20,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:32,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288663377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:32,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:20:32,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14, 15, 18, 16] total 60 [2021-11-25 20:20:32,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935085310] [2021-11-25 20:20:32,560 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:20:32,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-25 20:20:32,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:20:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-25 20:20:32,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=2769, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 20:20:32,564 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 60 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 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) [2021-11-25 20:21:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:21,173 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-11-25 20:21:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-25 20:21:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 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 33 [2021-11-25 20:21:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:21,175 INFO L225 Difference]: With dead ends: 103 [2021-11-25 20:21:21,175 INFO L226 Difference]: Without dead ends: 91 [2021-11-25 20:21:21,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2760 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=1555, Invalid=6277, Unknown=0, NotChecked=0, Total=7832 [2021-11-25 20:21:21,179 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 353 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:21,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 49 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 19.6s Time] [2021-11-25 20:21:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-25 20:21:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2021-11-25 20:21:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.131578947368421) internal successors, (86), 76 states have internal predecessors, (86), 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) [2021-11-25 20:21:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-25 20:21:21,203 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 33 [2021-11-25 20:21:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:21,204 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-25 20:21:21,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 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) [2021-11-25 20:21:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-25 20:21:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 20:21:21,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:21,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:21,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:21,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:21,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-25 20:21:21,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:21:21,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1038743711, now seen corresponding path program 6 times [2021-11-25 20:21:21,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:21:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911231269] [2021-11-25 20:21:21,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 20:21:21,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:21:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:21:21,813 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:21:21,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-25 20:21:21,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-25 20:21:21,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:21:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 20:21:22,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:30,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:38,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:21:38,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911231269] [2021-11-25 20:21:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911231269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:21:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [676104831] [2021-11-25 20:21:38,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 20:21:38,004 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:21:38,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:21:38,008 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:21:38,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-25 20:21:38,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:21:38,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665247225] [2021-11-25 20:21:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 20:21:38,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:38,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:38,211 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:38,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 1 [2021-11-25 20:21:38,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c4a78f8-3373-4e03-b05c-e2cc5a3087bd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-25 20:21:38,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-25 20:21:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:21:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:21:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:47,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:22:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:22:03,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665247225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:22:03,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 20:22:03,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16, 16] total 48 [2021-11-25 20:22:03,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635024160] [2021-11-25 20:22:03,430 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 20:22:03,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 20:22:03,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:22:03,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 20:22:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1769, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 20:22:03,432 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 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)